Novas, Himilce , author
A Plume Book, 2004
Buku Teks
Young, Bruce K., author
Bantam Dell, 2008
Buku Teks
Bagnall, Philip M., author
Springer, 2012
eBooks
Korea Overseas Information Service, 2003
Multimedia
Heilbroner, Robert L., author
Simon & Schuster, 1994
Buku Teks