Cita APA

Guttman, B. S., & Hopkins, J. W. (1983). Understanding biology. Harcourt Jovanovich.

Citación estilo Chicago

Guttman, Burton S., and Johns W. Hopkins. Understanding Biology. New York: Harcourt Jovanovich, 1983.

Cita MLA

Guttman, Burton S., and Johns W. Hopkins. Understanding Biology. Harcourt Jovanovich, 1983.

Warning: These citations may not always be 100% accurate.