Johnson, James H., author
Allyn and Bacon, 1997
Buku Teks
Carek, Donald J., author
Jason Aronson Inc, 1993
Buku Teks
Craig Haen, editor
Routledge, 2011
Buku Teks
Ross, Alan O.
John Wiley & Sons, 1981
Buku Teks
edited by Monica Lanyado and Ann Horne
Routledge, 2006
Buku Teks