Citazione APA

Patterson, L. E., & Welfel, E. R. (1999). The counseling process (5th ed.). Brooks/Cole.

Stile di citazione Chicago

Patterson, Lewis E., e Elizabeth Reynolds Welfel. The Counseling Process. 5th ed. Stamford, CT: Brooks/Cole, 1999.

Citazione MLA

Patterson, Lewis E., e Elizabeth Reynolds Welfel. The Counseling Process. 5th ed. Brooks/Cole, 1999.