Cita APA (7th ed.)
Enger, E. D., & Gibson, A. H. (1988). Concepts in Biology (5th ed.). Wm. C. Brown.
Cita Chicago (17th ed.)
Enger, Eldon D., i Andrew H. Gibson. Concepts in Biology. 5th ed. Iowa: Wm. C. Brown, 1988.
Cita MLA (9th ed.)
Enger, Eldon D., i Andrew H. Gibson. Concepts in Biology. 5th ed. Wm. C. Brown, 1988.
Atenció: Aquestes cites poden no estar 100% correctes.