APA (7th ed.) Citation

Vollmer, G. (1985). Was können wir wissen? Hirzel.

Chicago Style (17th ed.) Citation

Vollmer, Gerhard. Was Können Wir Wissen? Stuttgart: Hirzel, 1985.

MLA (9th ed.) Citation

Vollmer, Gerhard. Was Können Wir Wissen? Hirzel, 1985.

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