Greer, Nora Richter
Rockport Publishers, 1998
Buku Teks
McNeill, William H.
Unoiversity Of Chicago, 1954
Buku Teks
Augustynek, Zdzislaw
Kluwer Academic, 1989
Buku Teks
edited by Barry B. Baker
The Haworth Press, 1993
Buku Teks
Simonsen, Clifford E.
Pearson/Prentice Hall, 2004
Buku Teks