Lapiere, Richard T., author
McGraw-Hill, 1946
Buku Teks
Hess, Beth B., author
Macmillan, 1985
Buku Teks
Macionis, John J., author
Prentice-Hall, 2008
Buku Teks
McCarthy, E. Doyle, author
Routledge, 1996
Buku Teks
Andersen, Margaret L., author
Thomson, Wadsworth, 2009
Buku Teks