APA (7th ed.) Citation

Klink, P. (1971). Mengen. Bagel [u.a.].

Chicago Style (17th ed.) Citation

Klink, Peter. Mengen. Düsseldorf: Bagel [u.a.], 1971.

MLA (9th ed.) Citation

Klink, Peter. Mengen. Bagel [u.a.], 1971.