Gibson, R. L., & Mitchell, M. (1999). Introduction to counseling and guidance (5th ed.). Merrill.

Gibson, Robert L., and Marianne Mitchell. Introduction to Counseling and Guidance. 5th ed. New Jersey: Merrill, 1999.

Gibson, Robert L., and Marianne Mitchell. Introduction to Counseling and Guidance. 5th ed. Merrill, 1999.