Siewing, R., & Abs, M. (1980). Lehrbuch der Zoologie. G. Fischer.
Chicago Style (17th ed.) CitationSiewing, Rolf, and Michael Abs. Lehrbuch Der Zoologie. Stuttgart [u.a.]: G. Fischer, 1980.
MLA (9th ed.) CitationSiewing, Rolf, and Michael Abs. Lehrbuch Der Zoologie. G. Fischer, 1980.
Warning: These citations may not always be 100% accurate.