APA Citation

Hegner, R. W., & Engemann, J. G. (1968). Invertebrate zoology (2nd.). New York: Macmillan.

Chicago Style Citation

Hegner, Robert William, and Joseph G. Engemann. Invertebrate Zoology. 2nd. New York: Macmillan, 1968.

MLA Citation

Hegner, Robert William, and Joseph G. Engemann. Invertebrate Zoology. 2nd. New York: Macmillan, 1968.

Warning: These citations may not always be 100% accurate.