Moyar, Mark, author
Cambridge University Press, 2006
Buku Teks
Knoebl, Kuno
Frederick A. Praeger , 1967
Buku Teks
Lawrence, Mark Atwood, author
Oxford University Press, 2010
Buku Teks
Brown, T. Louise
New York Routledge 1991,
Buku Teks
Oegungmun Chulpansa, author
Foreign Languages Pub. House, 1996
Buku Teks