Agency for Agricultural Research and Development Ministry of Agriculture, 1992
Buku Referensi
Booth, Anne
Allen and Unwin, 1988
Buku Teks
Lepi Tanadjaja Tarmidi
2006
Artikel Jurnal
Flo. Academic Press , 1980
Buku Teks
Badan Penelitian dan Pengembangan Pertanian Deptan, 2006
Majalah, Jurnal, Buletin