Ng Chee Yuen, Charla Griffy-Brown
International Development Research Institute , 2001
Buku Teks
edited by Ng Chee Yuen, Charla Griffy-Brown
International Development Research Institute, 1999
Buku Referensi
Artikel Jurnal
edited by Lee Poh Onn
Institute of South East Asia Studies, 2013
eBooks
Gonzalez, Andrew B.
Oxford University Press, 1984
Buku Teks SO