DiClerico, Robert E., author
McGraw-Hill, 1984
Buku Teks
Parenti, Michael, author
Thomson, 2008
Buku Teks
White, Jane
Prentice-Hall, 1992
Buku Teks
Parenti, Michael
St Martin's press, 1998
Buku Teks
Dunn-Mascetti, Manuela
Balantine Books , 1994
Buku Teks