Dulfer, Eberhard
FAO of the United Nations , 1974
Buku Teks
Gomez, Kwanchai A., author
UI-Press, 1995
Buku Teks
BPPP Deptan RI, 1992
Buku Teks
Badan Penelitian dan pengembangan Pertanian, {s.a.}
Majalah, Jurnal, Buletin
Altieri, Miguel A., author
Westview Press, 1987
Buku Teks