Loughary, John W.
Helping others help themselves a guide to connseling skills
McGraw-Hill, 1979
 Buku Teks SO
Levine, Joanne
Working with people : the helping process
Pearson, 2013
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Helping people change : a textbook of methods
edited by Frederick H. Kanfer and Arnold P. Goldstein
Pergamon Press, 1991
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Katz, Alfred H.
Helping one another: self-help groups in a changing world
Third Party Publishing, 1990
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Whitaker, Dorothy Stock
Using groups to help people / Dorothy Stock Whitaker;
Routledge, 1994
 Buku Teks SO