Official methods of analysis of the Association of Official Agricultural Chemists
Horwitz, William, editor
Association of Official Agricultural Chemists, 1955
 Buku Referensi
Shepherd, Geoffrey S.
Agricultural price analysis
Iowa State University Press, 1968
 Buku Teks
Paik, C. M., 1931-
Quantitative methods for managerial decision
McGraw-Hill, 1973
 Buku Teks
Stermole, Franklin
Economic evaluation and investment decision methods
Investment Evaluations Corp, 2014
 Buku Teks
Piccolo, Alessandro, editor
Carbon sequestration in agricultural soils : a multidisciplinary approach to innovative methods
Springer, 2012
 eBooks