APA (7th ed.) Citation

Keller, G. (1923). Ursula. Matthes.

Chicago Style (17th ed.) Citation

Keller, Gottfried. Ursula. Leipzig [u.a.]: Matthes, 1923.

MLA (9th ed.) Citation

Keller, Gottfried. Ursula. Matthes, 1923.

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