APA (7th ed.) Citation

Siewing, R., & Abs, M. (1962). Lehrbuch der Zoologie. Fischer.

Chicago Style (17th ed.) Citation

Siewing, Rolf, and Michael Abs. Lehrbuch Der Zoologie. Stuttgart [u.a.]: Fischer, 1962.

MLA (9th ed.) Citation

Siewing, Rolf, and Michael Abs. Lehrbuch Der Zoologie. Fischer, 1962.

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