APA (7th ed.) Citation

Keller, G. (1942). Ursula. Rütten & Loening.

Chicago Style (17th ed.) Citation

Keller, Gottfried. Ursula. Potsdam: Rütten & Loening, 1942.

MLA (9th ed.) Citation

Keller, Gottfried. Ursula. Rütten & Loening, 1942.

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