Bello, Walden F.
Institute for Food and Development Policy, 1982
Buku Teks
Pronk, Jan P.
Yayasan Obor Indonesia, 1993
Buku Teks
World Bank
New York Oxford University Press 1992,
Buku Referensi
Evans, Gareth
Melbourne Univer, 1991
Buku Teks
Baum, Warren C.
Oxford University Press , 1985
Buku Teks