Buku Teks
Weismantel, Guy E.
Buku Teks
Holman, C. Hugh, author
Macmillan, 1986
Buku Referensi
Dalton, Bill, author
California Moon Publications , 1991
Buku Referensi
edited by Kim Young-kwon, Lee So-jung
Korean Overseas Information Service, Ministry of Culture and Information, 1990
Buku Referensi