Cita APA (7th ed.)
Solomon, E. P. (1993). Biology (4th.ed.). Saunders college.
Cita Chicago (17th ed.)
Solomon, Eldra Pearl. Biology. 4th.ed. Philadelphia: Saunders college, 1993.
Cita MLA (9th ed.)
Solomon, Eldra Pearl. Biology. 4th.ed. Saunders college, 1993.
Atenció: Aquestes cites poden no estar 100% correctes.