APA (7th ed.) Citation

Kükenthal, W., Helmcke, J., Lengerken, H. v., Hirsch, G., Herter, K., & Lehmann, G. (1956). Handbuch der Zoologie. Gruyter.

Chicago Style (17th ed.) Citation

Kükenthal, Willy, J.-G Helmcke, H. v. Lengerken, G.C Hirsch, Konrad Herter, and Gunther Lehmann. Handbuch Der Zoologie. Berlin: Gruyter, 1956.

MLA (9th ed.) Citation

Kükenthal, Willy, et al. Handbuch Der Zoologie. Gruyter, 1956.