Kenneth W. Abbott, Philipp Genschel, Duncan Snidal, Bernhard Zangl, editors
Cambrigde University Press , 2015
Buku Teks
McCoubrey, Hilaire
Brookfield Dartmouth , 1995
Buku Teks
edited by Glenn Morgan, Lars Engwall
Routledge, 1999
Buku Teks
Bennett, A. LeRoy
Prentice-Hall, 1977
Buku Teks
Kirgis, Frederic L.
West Publishing, 1993
Buku Teks