Books
McCaughrean, Geraldine, and Bee Willey. The Golden Hoard: Myths and Legends of the World. M.K. McElderry, 1996.
McCaughrean, Geraldine. El Cid. Oxford University Press, 2002.
Nicolle, David, and Angus McBride. El Cid and the Reconquista: 1050-1492. Osprey, 1992.
Simpson, Lesley Byrd, translator. The Poem of El Cid. University of California Press, 1985.
Websites
“El Cid” New World Encyclopedia, . 22 May 2013, 15:10 UTC. 12 Nov 2017 http://www.newworldencyclopedia.org/entry/El_Cid#Exile
Fuentes, Ventura. “El Cid.” The Catholic Encyclopedia. Vol. 3. New York: Robert Appleton Company, 1908. 12 Nov. 2017<http://www.newadvent.org/cathen/03769a.htm>.
Gilliam, Ronald. “The Genius of El Cid.” HistoryNet, 5 Dec. 2011, www.historynet.com/the-genius-of-el-cid.htm.
Russell, Peter Edward. “El Cid.” Encyclopædia Britannica, Encyclopædia Britannica, Inc., 2 Nov. 2016, www.britannica.com/biography/El-Cid-Castilian-military-leader.