JungBong Choi, Roald Maliangkay.
Routledge, 2015
Buku Teks
Singer, P. W., author
Cornell University Press, 2003
Buku Teks
Routledge, 2014
eBooks
Anderson, M.S.
Longman, 1993
Buku Teks
Hsu, Immanuel C.Y.
New York Oxford University Press 1995,
Buku Teks