Schultz, Theodore W.
Agriculture in an ucstable economy / Theodore W. Schultz
McGraw-Hill , 1945
 Buku Teks SO
Briggs, David J.
Agriculture and environment: the physical geography of temperature agriculture systems
Longman Scientific & Technical, 1994
 Buku Teks SO
Jaleel Ahmad
The Expert and the administrator
University of Pittsburgh, 1959
 Buku Teks
Hokanson, Clifford M.
Applied problems in mathematics for agriculture
Interstate Printers, 1984
 Buku Teks SO
Chemistry, agriculture and the environment
edited by Mervyn L. Richardson
Royal Society of Chemistry, 1991
 Buku Teks SO