APA (7th ed.) Citation

Hegner, R. W., & Engemann, J. G. (1968). Invertebrate zoology. Macmillan.

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

Hegner, Robert William, and Joseph G. Engemann. Invertebrate Zoology. Macmillan, 1968.

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