Levelt, W. J. M.: On-line processing constraints on the properties of signed and spoken language. In: Signed and spoken language: Biological constraints on linguistic form, pp. 141 - 160 (Eds. Bellugi, U.; Studdert-Kennedy, M.). Verlag Chemie, Weinheim (1980)

Levelt, W. J. M.: Toegepaste aspecten van het taal-psychologisch onderzoek: Enkele inleidende overwegingen. In: Toegepaste aspekten van de taalpsychologie, pp. 3 - 11 (Ed. Matter, J.F.). VU Boekhandel, Amsterdam (1980)

Klein, W.: Die Geschichte eines Tores. In: Sprache in Unterricht und Forschung: Schwerpunkt Romanistik, pp. 175 - 194 (Eds. Baum, R.; Hausmann, F. J.; Monreal-Wickert, I.). Narr, Tübingen (1979)

Levelt, W. J. M.: The origins of language and language awareness. In: Human ethology, pp. 739 - 745 (Eds. Von Cranach, M.; Foppa, K.; Lepenies, W.; Ploog, D.). Cambridge University Press, Cambridge (1979)

Levelt, W. J. M.; Kempen, G.: Language. In: Handbook of psychonomics (Vol. 2), pp. 347 - 407 (Eds. Michon, J. A.; Eijkman, E. G. J.; De Klerk, L. F. W.). North Holland, Amsterdam (1979)

Stassen, H.G.; Levelt, W. J. M.: Systems, automata, and grammars. In: Handbook of psychonomics: Vol. 1, pp. 187 - 243 (Eds. Michon, J.A.; Eijkman, E.G.J.; De Klerk, L.F.W.). North Holland, Amsterdam (1979)

Bowerman, M.: Words and sentences: Uniformity, variation, and shifts over time in patterns of acquisition. In: Communicative and cognitive abilities: Early behavioral assessment, pp. 349 - 396 (Eds. Minifie , F. D.; Lloyd, L. L.). University Park Press, Baltimore (1978)

Klein, W.: Soziolinguistik. In: Die Psychologie des 20. Jahrhunderts: Vol. 7. Piaget und die Folgen, pp. 1130 - 1147 (Ed. Balmer, H.). Kindler, Zürich (1978)

Klein, W.: The aquisition of German syntax by foreign migrant workers. In: Linguistic variation: models and methods, pp. 1 - 22 (Ed. Sankoff, D.). Academic Press, New York (1978)

Klein, W.; Heidelberger Forschungsprojekt "Pidgin - Deutsch": Aspekte der ungesteuerten Erlernung des Deutschen durch ausländische Arbeiter. In: German in contact with other languages / Deutsch im Kontakt mit anderen Sprachen, pp. 147 - 183 (Eds. Molony, C.; Zobl, H.; Stölting, W.). Scriptor, Wiesbaden (1978)

Levelt, W. J. M.: A survey of studies in sentence perception: 1970-1976. In: Studies in the perception of language, pp. 1 - 74 (Eds. Levelt, W. J. M.; Flores d'Arcais, G.B.). Wiley, New York (1978)

Levelt, W. J. M.; Sinclair, A.; Jarvella, R. J.: Causes and functions of linguistic awareness in language acquisition: Some introductory remarks. In: The child's conception of language, pp. 1 - 14 (Eds. Sinclair, A.; Jarvella, R.J.; Levelt, W. J. M.). Springer, Heidelberg (1978)

Klein, W.: Die Wissenschaft der Interpretation. In: Methoden der Textanalyse, pp. 1 - 23 (Ed. Klein, W.). Quelle und Meyer, Heidelberg (1977)

Levelt, W. J. M.; Van Gent, J.; Haans, A.; Meijers, A.: Grammaticality, paraphrase, and imagery. In: Acceptability in language, pp. 87 - 101 (Ed. Greenbaum, S.). Mouton, The Hague (1977)

Levelt, W. J. M.: Formal grammars and the natural language user: A review. In: Topics in artificial intelligence, pp. 226 - 290 (Ed. Marzollo, A.). Springer, Vienna (1976)

Levelt, W. J. M.; Kempen, G.: Taal. In: Handboek der Psychonomie, pp. 492 - 523 (Eds. Michon, J.A.; Eijkman, E.G.J.; De Klerk, L.). Van Loghum Slaterus, Deventer (1976)

Stassen, H.G.; Levelt, W. J. M.: Systemen, automaten en grammatica's. In: Handboek der psychonomie, pp. 100 - 127 (Eds. Michon, J.A.; Eijkman, E.; De Klerk, L.). Van Loghum Slaterus, Deventer (1976)

Klein, W.: Dialekt und Einheitssprache im Fremdsprachenunterricht. In: Beiträge zu den Sommerkursen des Goethe-Instituts München, pp. 53 - 60 (1973)

Klein, W.; Klein, W.: Formale Poetik und Linguistik. In: Beiträge zu den Sommerkursen des Goethe-Instituts München, pp. 190 - 195 (1971)

Levelt, W. J. M.: Semantic features: A psychological model and its mathematical analysis. In: Heymans Bulletins Psychologische instituten R.U. Groningen, HB-69-45, Vol. HB-69-45 (1969)