Harpur, James, author
Carlton , 2007
Buku Referensi
Singer, P. W., author
Cornell University Press, 2003
Buku Teks
Lim, C. J., author
Routledge , 2010
Buku Teks
Ramsey, Douglas K.
Houghton Mifflin, 1987
Buku Teks
Ambrose, Stephen E., author
Yayasan Obor Indonesia, 2007
Buku Teks