Yi, K. (2005). Koguryŏ yumul yŏn'gu. Kwahak Paekkwa Sajŏn Ch'ulp'ansa.
Chicago Style (17th ed.) CitationYi, Kwang-hŭi. Koguryŏ Yumul Yŏn'gu. P'yŏngyang: Kwahak Paekkwa Sajŏn Ch'ulp'ansa, 2005.
MLA (9th ed.) CitationYi, Kwang-hŭi. Koguryŏ Yumul Yŏn'gu. Kwahak Paekkwa Sajŏn Ch'ulp'ansa, 2005.
Warning: These citations may not always be 100% accurate.