Pack, P. E. (2001). CliffsAP biology (2nd ed.). IDG Books Worldwide.
Chicago Style (17th ed.) CitationPack, Phillip E. CliffsAP Biology. 2nd ed. Foster City, CA: IDG Books Worldwide, 2001.
ציטוט MLAPack, Phillip E. CliffsAP Biology. 2nd ed. IDG Books Worldwide, 2001.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.