APA (7th ed.) Citation

Kupka, I., & Wilsing, N. (1980). Conversational languages. J. Wiley.

Chicago Style (17th ed.) Citation

Kupka, I., and Norbert Wilsing. Conversational Languages. Chichester [Eng.] ; New York: J. Wiley, 1980.

MLA (8th ed.) Citation

Kupka, I., and Norbert Wilsing. Conversational Languages. J. Wiley, 1980.

Warning: These citations may not always be 100% accurate.