by Mike Savage ...[and others]
Routledge, 1992
Buku Teks
edited by by Van Nguyen-Marshall, Lisa B. Welch Drummond, Daniele Belanger
Springer, 2012
eBooks
Kompas, 2000
Buku Teks
Evers, Hans-Dieter, author
Yayasan Obor Indonesia, 1992
Buku Teks
Healey, Joseph F., 1945-, author
Pine Forge Press, 1998
Buku Teks