Nafziger, E. Wayne, author
Prentice-Hall, 1990
Buku Teks
Myint, Hla, author
Hutchinson University Library, 1973
Buku Teks
edited by Kenneth Lee, Anne Mills
Oxford University Press, 1984
Buku Teks
Yong-Shik, Lee, author
Kluwer, 2008
Buku Teks
Bello, Walden F., author
Institute for Food and Development Policy, 1982
Buku Teks