APA citiranje

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

Trích dẫn kiểu Chicago

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

MLA citiranje

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