edited by Robert H. Beck
National Association of Social Workers, 1965
Buku Teks
Foster, Lois E. Elaine
Prentice-Hall, 1981
Buku Teks
Andersen, Margaret L., author
Thomson, Wadsworth, 2009
Buku Teks
Giddens, Anthony, author
W.W. Norton & Compan, 2005
Buku Teks
Hughes, Michael, author
McGraw-Hill, Higher Education, 2009
Buku Teks