Unesco , 1982
Buku Teks
edited by Ann Mattis
Duke University Press in collaboration with the Society for International Development, 1983
Buku Teks
Willis, Katie, 1968-, author
Routledge, 2011
Buku Teks
edited by Paul Streeten
Macmillan, 1973
Buku Teks
edited by Harold Lasswell, Daniel Lerner and John D. Montgomery
MIT Press, 1976
Buku Teks