Christopher, Elphis
Temple Smith, 1980
Buku Teks SO
Shaw, Ian
Sage, 2001
Buku Teks SO
National Association of Social of social Workers, 1980
Buku Teks
National Association of Social of social Workers, 1980
Buku Teks
edited by Edmund Sherman and William J. Reid
Columbia University Press, 1994
Buku Teks SO