Best, John W.
Prentice Hall of India, 1982
Buku Teks
Best, John W.
Prentice-Hall, 1977
Buku Teks
Kim, Ransoo
SeuolJong-Gak , 1986
Buku Teks
edited by Geoffrey Walford
Falmer Press, 1998
Buku Teks
John Sikula, senior editor ; Thomas Buttery, editor, Edith Guyton, editor
Macmillan Library Reference USA, 1996
Buku Referensi