"Holt McDougal - Social Studies, World History, High School, World History: Patterns of Interaction." Holt McDougal - Social Studies, World History, High School, World History: Patterns of Interaction. N.p., n.d. Web. 18 Feb. 2013.
Yonglin, Jiang. "Han Dynasty." Encyclopedia of Modern Asia. Ed. Karen Christensen and David Levinson. Vol. 2. New York: Charles Scribner's Sons, 2002. 482-485. Gale Virtual Reference Library. Web. 21 Feb. 2013.
.
Yonglin, Jiang. "Han Dynasty." Encyclopedia of Modern Asia. Ed. Karen Christensen and David Levinson. Vol. 2. New York: Charles Scribner's Sons, 2002. 482-485. Gale Virtual Reference Library. Web. 21 Feb. 2013.
.