Cita APA (7th ed.)

Curtis, H., & Barnes, N. S. (1994). Invitation to Biology (5th.ed.). Worth.

Cita Chicago (17th ed.)

Curtis, Helena, i N. Sue Barnes. Invitation to Biology. 5th.ed. New York: Worth, 1994.

Cita MLA (9th ed.)

Curtis, Helena, i N. Sue Barnes. Invitation to Biology. 5th.ed. Worth, 1994.