Johnson, J. A. (1963). Group therapy: A practical approach. Blakiston Division, McGraw-Hill.
Cita Chicago (17th ed.)Johnson, James A. Group Therapy: A Practical Approach. New York: Blakiston Division, McGraw-Hill, 1963.
Cita MLA (9th ed.)Johnson, James A. Group Therapy: A Practical Approach. Blakiston Division, McGraw-Hill, 1963.
Atenció: Aquestes cites poden no estar 100% correctes.