Heppner, P. P., Wampold, B. E., & Kivlighan, D. M. (1999). Research design in counseling (2nd ed.). Brooks/Cole/Wadsworth.
Style de citation Chicago (17e éd.)Heppner, P. Paul, Bruce E. Wampold, et Dennis M. Kivlighan. Research Design in Counseling. 2nd ed. Belmont, CA: Brooks/Cole/Wadsworth, 1999.
Style de citation MLA (9e éd.)Heppner, P. Paul, et al. Research Design in Counseling. 2nd ed. Brooks/Cole/Wadsworth, 1999.
Attention : ces citations peuvent ne pas être correctes à 100%.