APA ציטוט

Heppner, P. P. (2008). Research design in counseling. Belmont, CA: Thomson Brooks/Cole.

Trích dẫn kiểu Chicago

Heppner, P. Paul. Research Design in Counseling. Belmont, CA: Thomson Brooks/Cole, 2008.

ציטוט MLA

Heppner, P. Paul. Research Design in Counseling. Belmont, CA: Thomson Brooks/Cole, 2008.