Passin, Herbert
Kodansha, 1982
Buku Teks
Fakultas Ilmu Tarbiyah dan Keguruan (FITK) UIN Syarif Hidayatullah, 2014
Majalah, Jurnal, Buletin
Jeanne H. Ballantine, Joan Z. Spade, editors
SAGE Publications, 2015
Buku Teks SO
edited by Robert H. Beck
National Association of Social Workers, 1965
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Conant, James B.
Oxford University Press, 1946
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