countrystudies.us. N.p., n.d. Web. 10 June 2014. <http://countrystudies.us/nigeria/3.htm>.
“Igbo.” http://www.britannica.com. Encyclopedia Britannica Inc., 2014. Web. 10 June 2014. <http://www.britannica.com/EBchecked/topic/282215/Igbo>.
“Nigeria.” infoplease.com. Columbia University Press, 2012. Web. 10 June 2014. <http://www.infoplease.com/encyclopedia/world/nigeria-history.html>.
“Religion.” Igboguide.org. Michael Widjaja, 2011. Web. 10 June 2014. <http://www.igboguide.org/HT-chapter6.htm>.