Cole, G.D.H. (George Douglas Howard), 1889-1959, author
The Co-operative union Ltd., 1944
Buku Teks
Tung, Ta-Lin, author
Foreign Languages Press, 1959
Buku Teks
edited by Mohamed Ariff
Institute of Southeast Asian Studies, 1998
Buku Teks
United Nations Development Program
Jakarta: United Nations Development Program, 1993,
Buku Referensi
United Nations Development Program
Jakarta: United Nations Development Program, 1993,
Buku Referensi