Cita APA (7th ed.)

Pack, P. E. (2001). CliffsAP biology (2nd ed.). IDG Books Worldwide.

Cita Chicago (17th ed.)

Pack, Phillip E. CliffsAP Biology. 2nd ed. Foster City, CA: IDG Books Worldwide, 2001.

Cita MLA (9th ed.)

Pack, Phillip E. CliffsAP Biology. 2nd ed. IDG Books Worldwide, 2001.