Gong, Ning, compiler
China International Press, 2008
Buku Teks
Ha, Tae Hung, author
Yonsei University Press, 1958
Buku Teks
Yoo, Yeol-su
Yekyong Publishing Co., 2002
Buku Referensi
Glazer, Tom, author
Bantam Books, 1961
Buku Teks
Howard, Keith, author
Royal Asiatic Society Korea Branch, 1990
Buku Teks