McLeod, John
Sage Publications, 2002
Buku Teks SO
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Sage, 2004
Buku Teks SO
Sylvia D. Elvira
Balai Penerbit Fakultas Kedokteran Universitas Indonesia, 2005
Buku Teks SO
Piercy, Fred P.
Guilford Press, 1986
Buku Teks SO
Strean, Herbert S.
Sage Publications, 1985
Buku Teks SO