Tappan, Frances M.
Appletton & Lange , 1998
Buku Teks
McGuire, Paul
Oxford University Press, 1948
Buku Teks
Sage publications, 1996
Buku Teks
Herskovits, Melville J.
Columbia University Press, 1936
Buku Teks
Piven, Frances Fox
Pantheon Books, 1977
Buku Teks