Παραπομπή APA

Heppner, P. P., & P. Paul Heppner; Bruce E. Wampold; Dennis M. Kivlighan; Jr. (2008). Research design in counseling. Belmont, CA: Thomson Brooks/Cole.

Παραπομπή Chicago Style

Heppner, P. Paul, και P. Paul Heppner; Bruce E. Wampold; Dennis M. Kivlighan; Jr. Research Design in Counseling. Belmont, CA: Thomson Brooks/Cole, 2008.

Παραπομπή MLA

Heppner, P. Paul, και P. Paul Heppner; Bruce E. Wampold; Dennis M. Kivlighan; Jr. Research Design in Counseling. Belmont, CA: Thomson Brooks/Cole, 2008.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.