Pack, P. E. (2001). CliffsAP biology (2nd ed.). IDG Books Worldwide.
Lua i Stíl Chicago (17ú heag.)Pack, Phillip E. CliffsAP Biology. 2nd ed. Foster City, CA: IDG Books Worldwide, 2001.
Lua MLA (9ú heag.)Pack, Phillip E. CliffsAP Biology. 2nd ed. IDG Books Worldwide, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.