Scott, W.A.H., author
Erlangga, 1996
Buku Referensi
MeCahill, T.A., author
Erlangga, 1996
Buku Referensi
Slater, Lucy Joan, author
Cambridge Univeristy Press, 1976
Buku Teks
Kim, Woon il, author
Moonhakgwa Jiseongsa, 2003
Buku Teks
Lee, Jong-ho, author
Chang Jak iwa BT pyong Sa, 1999
Buku Teks