Cita APA (7th ed.)
Alters, S. (1996). Biology: Understanding life (2nd ed.). Mosby.
Cita Chicago (17th ed.)
Alters, Sandra. Biology: Understanding Life. 2nd ed. Baltimore: Mosby, 1996.
Cita MLA (9th ed.)
Alters, Sandra. Biology: Understanding Life. 2nd ed. Mosby, 1996.
Atenció: Aquestes cites poden no estar 100% correctes.