National Association of Social of social Workers, 1980
Buku Teks
Shaw, Ian
Sage, 2001
Buku Teks
Rubin, Ellen
Brooks/Cole, 1993
Buku Teks
edited by Norman A. Polansky
University of Chicago Press, 1962
Buku Teks
editor, Bruce A. Thyer
Sage Publications, 2001
Buku Referensi