Cleaver, Kevin M.
The World Bank , 1980
Buku Teks
edited by J.B. Dent and J.R. Anderson
John Wiley & Sons, 1971
Buku Teks
Roumasset, James
National University Press, c1981
Buku Teks
Horwitz, William, editor
Association of Official Agricultural Chemists, 1955
Buku Referensi
Pusat Analisis Sosial Ekonomi dan Kebijakan Pertanian BPPP-Deptan, [, 2008]
Majalah, Jurnal, Buletin