APA (7th ed.) Citation

(1909). Sammlung Dr. Adolf Hommel, Zürich.

Chicago Style (17th ed.) Citation

Sammlung Dr. Adolf Hommel, Zürich. Köln, 1909.

MLA (9th ed.) Citation

Sammlung Dr. Adolf Hommel, Zürich. 1909.

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