Institute of Social Studies
Institute of Social Studies, 2000
Buku Teks
The World Bank Group, 2000
Buku Referensi
International Institute for Asian Studies, 1995
Buku Teks
The OPEC Fund for International Development, 2000
Buku Teks
Food and Fertilizer Technology Center for the Asian and Pasific Region, 1970
Buku Teks