APA (7th ed.) Citation

Jensen, H., & Grunau, G. (1891). Ex Libris Gustav Grunau Dr. phil. Bern.

Chicago Style (17th ed.) Citation

Jensen, Harald, and Gustav Grunau. Ex Libris Gustav Grunau Dr. Phil. Bern. Bern, 1891.

MLA (9th ed.) Citation

Jensen, Harald, and Gustav Grunau. Ex Libris Gustav Grunau Dr. Phil. Bern. 1891.

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