APA
Corey G., . (2012). Theory and practice of group counseling, 8th ed. [Place of publication not identified]: Cengage Learning.
Chicago
Corey Gerald, . 2012. Theory and practice of group counseling, 8th ed. [Place of publication not identified]: Cengage Learning.
Harvard
Corey G., . (2012). Theory and practice of group counseling, 8th ed. [Place of publication not identified]: Cengage Learning.
MLA
Corey Gerald, . Theory and practice of group counseling, 8th ed. [Place of publication not identified]: Cengage Learning. 2012.