APA (7th ed.) Citation

Kükenthal, W., Helmcke, J., Schloeth, R., & Müller-Using, D. (1967). Handbuch der Zoologie. Gruyter.

Chicago Style (17th ed.) Citation

Kükenthal, Willy, J.-G Helmcke, R. Schloeth, and D. Müller-Using. Handbuch Der Zoologie. Berlin: Gruyter, 1967.

MLA (9th ed.) Citation

Kükenthal, Willy, et al. Handbuch Der Zoologie. Gruyter, 1967.