Cita APA (7th ed.)
Norstog, K., & Meyerriecks, A. J. (1985). Biology (2nd ed.). Charles E.Merill.
Cita Chicago (17th ed.)
Norstog, Knut, i Andrew J. Meyerriecks. Biology. 2nd ed. Columbus: Charles E.Merill, 1985.
Cita MLA (9th ed.)
Norstog, Knut, i Andrew J. Meyerriecks. Biology. 2nd ed. Charles E.Merill, 1985.
Atenció: Aquestes cites poden no estar 100% correctes.