Cita APA (7th ed.)

Dyer, W. W., & Vriend, J. (1980). Group counseling for personal mastery: Everything you need to know to lead any group in any setting. Sovereign Books.

Cita Chicago (17th ed.)

Dyer, Wayne W., i John Vriend. Group Counseling for Personal Mastery: Everything You Need to Know to Lead Any Group in Any Setting. New York: Sovereign Books, 1980.

Cita MLA (9th ed.)

Dyer, Wayne W., i John Vriend. Group Counseling for Personal Mastery: Everything You Need to Know to Lead Any Group in Any Setting. Sovereign Books, 1980.