Cita APA

Raven, P. H., & Johnson, G. B. (1988). Understanding Biology (2nd.). Wm. C. Brown Publishers.

Citación estilo Chicago

Raven, Peter H., and George B. Johnson. Understanding Biology. 2nd. London: Wm. C. Brown Publishers, 1988.

Cita MLA

Raven, Peter H., and George B. Johnson. Understanding Biology. 2nd. Wm. C. Brown Publishers, 1988.