Hickman, c. P., Hickman, F., & Roberts, L. S. (1989). Biology of animals (4th ed.). Mosby college.
Lua i Stíl Chicago (17ú heag.)Hickman, cleveland P., Frances Hickman, agus Larry S. Roberts. Biology of Animals. 4th ed. St. Louis: Mosby college, 1989.
Lua MLA (9ú heag.)Hickman, cleveland P., et al. Biology of Animals. 4th ed. Mosby college, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.