edited by Herbert C. Morton
Brookings Institution, 1965
Buku Teks
Breton, Albert
University Press, 1998
Buku Teks
United Nations, 2007
Buku Teks
edited by Charles Lewis Taylor
Sage, 1983
Buku Teks
Mathew A. White, Gavin R. Slemp, A. Simon Murrary, editors
Springer, 2017
Buku Teks