APA (7th ed.) Citation

Ruge, S. (1894). Christoph Columbus. Hofmann.

Chicago Style (17th ed.) Citation

Ruge, Sophus. Christoph Columbus. Berlin: Hofmann, 1894.

MLA (9th ed.) Citation

Ruge, Sophus. Christoph Columbus. Hofmann, 1894.

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