Departemen Pertanian RI, 1985
Buku Teks
Longkutoy, John J., author
Mutiara Sumber Widya, 1989
Buku Teks SO
Kavanagh, John, author
Elex Media Komputindo, 1993
Buku Teks
Jogiyanto H.M., author
Andi , 1999
Buku Teks
Jogiyanto H.M., author
Andi, 2000
Buku Teks