ISEAS, 2005
Buku Teks
Sakhuja, Vijay, author
Institute of South East Asia Studies, 2011
eBooks
Ward, Ralph D.
John Wiley & Sons, 1997
Buku Teks
Yablonsky, Lewis, author
Wadsworth, 2000
Buku Teks
Nugent William R., author
Thomson Learning, 2001
Buku Teks