APA (7th ed.) Citation

Schupp, V. (1972). Deutsches Rätselbuch. Philipp Reclam jun.

Chicago Style (17th ed.) Citation

Schupp, Volker. Deutsches Rätselbuch. Stuttgart: Philipp Reclam jun, 1972.

MLA (9th ed.) Citation

Schupp, Volker. Deutsches Rätselbuch. Philipp Reclam jun, 1972.

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