Pusat Analisis Sosial Ekonomi dan Kebijakan Pertanian BPPP-Deptan, 1981
Majalah, Jurnal, Buletin
Hodgetts, Richard M., author
Saunders, 1977
Buku Teks
edited by George E. Dickinson and Michael R. Leming
McGraw-Hill, 2014
Buku Teks
Shuman, Howard E.
Prentice-Hall, 1992
Buku Teks
Rosenberg, Nathan, author
World Scientific, 2010
Buku Teks