Platt, Richard. Castle. London: DK, 2007. Print.
Riggs, Kate. Knights. Mankato, MN: Creative Education, 2011. Print.
Ross, Stewart. Monarchs. San Diego: Lucent, 2004. Print.
Steele, Philip. Castles. New York: Kingfisher, 1995. Print.
Sims, Lesley, and Dominic Groebner. The Usborne Book of Castles. London: Usborne, 2002. Print.
"Architecture." Architecture. 1 Jan. 1995. Web. 19 Mar. 2015.
"History - HowStuffWorks." Castle History Http://history.howstuffworks.com/middle-ages/castle-history.htm. How Stuff Works, 29 Feb. 2008. Web. 19 Mar. 2015.
Trueman, Chris. "History Learning Site." History Learning Site. 1 Jan. 2014. Web. 19 Mar. 2015.
Riggs, Kate. Knights. Mankato, MN: Creative Education, 2011. Print.
Ross, Stewart. Monarchs. San Diego: Lucent, 2004. Print.
Steele, Philip. Castles. New York: Kingfisher, 1995. Print.
Sims, Lesley, and Dominic Groebner. The Usborne Book of Castles. London: Usborne, 2002. Print.
"Architecture." Architecture. 1 Jan. 1995. Web. 19 Mar. 2015.
"History - HowStuffWorks." Castle History Http://history.howstuffworks.com/middle-ages/castle-history.htm. How Stuff Works, 29 Feb. 2008. Web. 19 Mar. 2015.
Trueman, Chris. "History Learning Site." History Learning Site. 1 Jan. 2014. Web. 19 Mar. 2015.