Citazione Stile APA (7a Edizione)

Heppner, P. P., Wampold, B. E., & Kivlighan, D. M. (1999). Research design in counseling (2nd ed.). Brooks/Cole/Wadsworth.

Citazione stile Chigago Style (17a edizione)

Heppner, P. Paul, Bruce E. Wampold, e Dennis M. Kivlighan. Research Design in Counseling. 2nd ed. Belmont, CA: Brooks/Cole/Wadsworth, 1999.

Citatione MLA (9a ed.)

Heppner, P. Paul, et al. Research Design in Counseling. 2nd ed. Brooks/Cole/Wadsworth, 1999.