Ch'oe, De Bary, Deuchler e Lee, 2000, p. 235. (EN) Ch'oe Yŏng-ho, William Theodore De Bary, Martina Deuchler e Peter Hacksoo Lee, Sources of Korean Tradition, vol. 2: From the Sixteenth to the Twentieth Centuries, New York, Columbia University Press, 2000.
Kim, 2005, pp. 107-108. (EN) Kim Chun-gil, The History of Korea, Westport, Connecticut, Greenwood Press, 2005.