Australian Centre for International Agricultural Research , 1985
Buku Teks
Agency for Agricultural Research and Development Ministry of Agriculture, 1992
Buku Referensi
Ika Darnhofer, editor
[, Springer], 2012
eBooks
Cirad, 1999
Buku Teks
Bird, Richard M., author
Harvard University Press, 1974
Buku Teks