APA Edition Citation

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

Chicago Edition Citation

Hegner, Robert W., and Joseph G. Engemann. Invertebrate Zoology: : 2nd Ed. 2nd ed. London: Macmillan Company, 1968.

MLA Edition Citation

Hegner, Robert W., and Joseph G. Engemann. Invertebrate Zoology: : 2nd Ed. 2nd ed. Macmillan Company, 1968.