(1)The University of Michigan. (October, 2000). Evidence of Brain Chemistry Abnormalities in Bipolar Disorder. Accessed October 30, 2000.
(2)Durand, V. M. & Barlow, D. H. (2000). Abnormal Psychology: An Introduction. Scarborough, Ontario: Wadsworth.
(3)Davis, S. F., & Palladino, J. J. (2000). Psychology (3rd ed.). Upper Saddle River, NJ: Prentice-Hall, Inc.
(4)Bernstein, D. A., Clarke-Stewart, A., Penner, L. A., Roy, E. J., & Wickens, C. D. (2000). Psychology (5th ed.). Boston, MA: Houghton Mifflin Company.

