There are some differences in the required textbooks and grading between the undergraduate and graduate versions of the course. Both are presented below.
Textbooks
Robbins, Stephen P.
Organizational Behavior. 9th Edition. Prentice Hall, 2001.
Leavitt, Harold J., Louis R. Pondy, and David M. Boje (Ed.). Readings in Managerial Psychology. 4th Edition. The University of Chicago Press, 1989.