Mader, S. S. (1999). Ready notes for use with Biology (6th ed.). WCB/McGraw-Hill.
Cita Chicago (17th ed.)Mader, Sylvia S. Ready Notes for Use with Biology. 6th ed. Boston, Mass.: WCB/McGraw-Hill, 1999.
Cita MLA (9th ed.)Mader, Sylvia S. Ready Notes for Use with Biology. 6th ed. WCB/McGraw-Hill, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.