Mader, S. S. (1993). Biology: Part five, Biology of animal structure and function (4th ed.). Wm. C. Brown Publishers.
Cita Chicago (17th ed.)Mader, Sylvia S. Biology: Part Five, Biology of Animal Structure and Function. 4th ed. Dubuque, IA: Wm. C. Brown Publishers, 1993.
Cita MLA (9th ed.)Mader, Sylvia S. Biology: Part Five, Biology of Animal Structure and Function. 4th ed. Wm. C. Brown Publishers, 1993.
Atenció: Aquestes cites poden no estar 100% correctes.