Stein, Donald G., author
Macmillan, 1974
Buku Teks
Schwartz, Barry, author
W.W. Norton, 1991
Buku Teks
Lutz, John, author
Waveland Press, 2005
Buku Teks
edited by Daniel Reisberg and Paula Hertel
Oxford University Press, 2004
Buku Teks
Lieberman, David A., author
Thomson Wadsworth, 2004
Buku Teks