Report of a SEADAG Rural Development Seminar Meeting, 1969
Buku Teks
Herren, Ray V.
Delmar Learning , 2013
Buku Teks
Juergensmeyer, Julian Conrad
Little, Brown, 1982
Buku Teks
edited by Melvin G. Blase
Iowa State University Press, 1971
Buku Teks
Norton, George W.
McGraw-Hill, 1993
Buku Teks