Engemann, J. G., & Hegner, R. W. (1981). Invertebrate zoology (3rd ed.). Macmillan.
Chicago Style (17th ed.) CitationEngemann, Joseph G., and Robert W. Hegner. Invertebrate Zoology. 3rd ed. New York: Macmillan, 1981.
MLA (9th ed.) CitationEngemann, Joseph G., and Robert W. Hegner. Invertebrate Zoology. 3rd ed. Macmillan, 1981.
Warning: These citations may not always be 100% accurate.