APA (7th ed.) Citation

Zäch, A. (1945). Gottfried Keller. Haupt.

Chicago Style (17th ed.) Citation

Zäch, Alfred. Gottfried Keller. Bern: Haupt, 1945.

MLA (9th ed.) Citation

Zäch, Alfred. Gottfried Keller. Haupt, 1945.

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