Hickman, c. P., Hickman, F., & Roberts, L. S. (1989). Biology of animals (4th ed.). Mosby college.
Cita Chicago Style (17a ed.)Hickman, cleveland P., Frances Hickman, y Larry S. Roberts. Biology of Animals. 4th ed. St. Louis: Mosby college, 1989.
Cita MLA (9a ed.)Hickman, cleveland P., et al. Biology of Animals. 4th ed. Mosby college, 1989.
Precaución: Estas citas no son 100% exactas.