APA (7th ed.) Citation

Kükenthal, W., Helmcke, J., & Schneider, R. (1964). Handbuch der Zoologie. Gruyter.

Chicago Style (17th ed.) Citation

Kükenthal, Willy, J.-G Helmcke, and Rolf Schneider. Handbuch Der Zoologie. Berlin: Gruyter, 1964.

MLA (9th ed.) Citation

Kükenthal, Willy, et al. Handbuch Der Zoologie. Gruyter, 1964.

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