APA (7th ed.) Citation

Horneffer, E. (1921). Erkenntnis. Oldenbourg.

Chicago Style (17th ed.) Citation

Horneffer, Ernst. Erkenntnis. München [u.a.]: Oldenbourg, 1921.

MLA (9th ed.) Citation

Horneffer, Ernst. Erkenntnis. Oldenbourg, 1921.

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