Cita APA (7th ed.)

Raven, P. H. (1995). Understanding biology (3rd ed.). McGraw-Hill.

Cita Chicago (17th ed.)

Raven, Peter H. Understanding Biology. 3rd ed. Boston: McGraw-Hill, 1995.

Cita MLA (9th ed.)

Raven, Peter H. Understanding Biology. 3rd ed. McGraw-Hill, 1995.