Kim, Man Hee, author
Hyeonmsa, 2002
Buku Teks
Fischer, Hermann, author
Cambridge University Press, 2010
eBooks
Fischer, Hermann, author
Cambridge University Press, 1991
eBooks
Medhi, Jyotiprasad, author
Wiley Eastern, 1982
Buku Teks
King, Chris, author
Longman, 1992
Buku Teks