APA (7th ed.) Citation

Ruppert, E. E., & Barnes, R. D. (1991). Invertebrate zoology (6th ed.). Saunders College Publ.

Chicago Style (17th ed.) Citation

Ruppert, Edward E., and Robert D. Barnes. Invertebrate Zoology. 6th ed. Philadelphia [u. a.]: Saunders College Publ, 1991.

MLA (9th ed.) Citation

Ruppert, Edward E., and Robert D. Barnes. Invertebrate Zoology. 6th ed. Saunders College Publ, 1991.