Pack, P. E. (2001). CliffsAP biology (2nd ed.). IDG Books Worldwide.
Chicago Style aipamenaPack, Phillip E. CliffsAP Biology. 2nd ed. Foster City, CA: IDG Books Worldwide, 2001.
MLA aipamenaPack, Phillip E. CliffsAP Biology. 2nd ed. IDG Books Worldwide, 2001.
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