Cita APA (7a ed.)

Wessells, N. K., & Hopson, J. L. (1988). Biology. Random House.

Cita Chicago Style (17a ed.)

Wessells, Norman K., y Janet L. Hopson. Biology. New York: Random House, 1988.

Cita MLA (9a ed.)

Wessells, Norman K., y Janet L. Hopson. Biology. Random House, 1988.