Cita APA (7a ed.)
Heppner, P. P., Kivlighan, D. M., & Wampold, B. E. (2008). Research design in counseling (3rd ed.). Thomson Brooks/Cole.
Cita Chicago Style (17a ed.)
Heppner, P. Paul, Dennis M. Kivlighan, y Bruce E. Wampold. Research Design in Counseling. 3rd ed. Belmont, CA: Thomson Brooks/Cole, 2008.
Cita MLA (9a ed.)
Heppner, P. Paul, et al. Research Design in Counseling. 3rd ed. Thomson Brooks/Cole, 2008.
Precaución: Estas citas no son 100% exactas.