APA (7th ed.) Citation

Küntzel, G., & Leber, B. (1960). Arthur Schopenhauer. [s.n.].

Chicago Style (17th ed.) Citation

Küntzel, Gerhard, and Beate Leber. Arthur Schopenhauer. [Frankfurt am Main]: [s.n.], 1960.

MLA (9th ed.) Citation

Küntzel, Gerhard, and Beate Leber. Arthur Schopenhauer. [s.n.], 1960.

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