APA (7th ed.) Citation

Engermann, J. G. a. H. (1981). Invertebrate zoology (3rd ed.). McMillan Publishing, Co.

Chicago Style (17th ed.) Citation

Engermann, Joseph G. and Hegner. Invertebrate Zoology. 3rd ed. New York, N. Y: McMillan Publishing, Co, 1981.

MLA (9th ed.) Citation

Engermann, Joseph G. and Hegner. Invertebrate Zoology. 3rd ed. McMillan Publishing, Co, 1981.