Dyfyniad APA

Johnson, J. A. (1963). Group therapy: A practical approach. Blakiston Division, McGraw-Hill.

Dyfyniad Arddull Chicago

Johnson, James A. Group Therapy: A Practical Approach. New York: Blakiston Division, McGraw-Hill, 1963.

Dyfyniad MLA

Johnson, James A. Group Therapy: A Practical Approach. Blakiston Division, McGraw-Hill, 1963.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.