Bowring, James R.
Marketing policies for agriculture
Prentice-Hall, 1960
 Buku Teks
Conservation and agriculture
edited by Joan Davidson and Richard Lloyd
John Wiley & Sons, 1979
 Buku Teks
Hammonds, Carsie, 1894-
Teaching agriculture
Mcgraw-Hill , 1950
 Buku Teks
Moverley, John
Microcomputers in agriculture
Harper-Collins, 1986
 Buku Teks
Kurtz, David L.
Marketing
The Dryden Press , 1981
 Buku Teks