Baten, Joerg, author
Cambridge University Press, 2016
Buku Teks
Bladen, V.W.
University of Toronto Press, 1959
Buku Klasik
Rhonda Phillips, Robert H. Pittman, editor
Routledge, 2009
Buku Teks
Hettne, Bjorn 1939-
Longman Scientific & Technical , 1995
Buku Teks
World Bank
Oxford University Press, 1988
Buku Teks