Engermann, J. G. a. H. (1981). Invertebrate zoology (3rd ed.). McMillan Publishing, Co.
Chicago Style (17th ed.) CitationEngermann, Joseph G. and Hegner. Invertebrate Zoology. 3rd ed. New York, N. Y: McMillan Publishing, Co, 1981.
MLA (9th ed.) CitationEngermann, Joseph G. and Hegner. Invertebrate Zoology. 3rd ed. McMillan Publishing, Co, 1981.
Warning: These citations may not always be 100% accurate.