Streeten, Paul P., author
Boston Institute for Economic Development, Boston University 1989,
Buku Teks
Cambridge University Press , 2012
Buku Teks
Mothersill, Carmel E., editor
Springer, 2012
eBooks
Hough, Peter, 1967-, author
Routledge, 2008
Buku Teks
edited by Nicholas Polunin
Cambridge University Press, 1998
Buku Teks