Shaw, Susan, author
John Wiley & Sons, 2009
Buku Teks
Powell, G. Bingham, author
Yale University Press, 2000
Buku Teks
Lockman, Zachary, author
Cambridge University Press, 2004
Buku Teks
edited, Mark T. Berger, Douglas A. Borer
Routledge, 1997
Buku Teks
Dijkink, Gertjan
Routledge , 1996
Buku Teks