Mader, S. S. (1998). Student study guide to accompany Biology (6th ed.). WCB/McGraw-Hill.
Cita Chicago (17th ed.)Mader, Sylvia S. Student Study Guide to Accompany Biology. 6th ed. Boston, Mass.: WCB/McGraw-Hill, 1998.
Cita MLA (9th ed.)Mader, Sylvia S. Student Study Guide to Accompany Biology. 6th ed. WCB/McGraw-Hill, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.