APA (7th ed.) Citation

Ungerer, T., & Killy, W. (1980). Fornicon: Tomi Ungerer. Vorwort von Walther Killy. Diogenes.

Chicago Style (17th ed.) Citation

Ungerer, Tomi, and Walther Killy. Fornicon: Tomi Ungerer. Vorwort Von Walther Killy. Zürich: Diogenes, 1980.

MLA (8th ed.) Citation

Ungerer, Tomi, and Walther Killy. Fornicon: Tomi Ungerer. Vorwort Von Walther Killy. Diogenes, 1980.

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