Hegner, R. W., & Engemann, J. G. (1968). Invertebrate zoology (2nd.). New York: Macmillan.
Chicago Style CitationHegner, Robert William, and Joseph G. Engemann. Invertebrate Zoology. 2nd. New York: Macmillan, 1968.
MLA CitationHegner, Robert William, and Joseph G. Engemann. Invertebrate Zoology. 2nd. New York: Macmillan, 1968.
Warning: These citations may not always be 100% accurate.