Selby, David
Cambridge University Press, 1988
Buku Teks
Unesco, 1970
Buku Teks
edited by Alice H. Henkin
Aspen Institute for Humanistic Studies, 1979
Buku Teks
edited by Ian Brownlie, Guy S. Goodwin-Gill
Clarendon Press, 1971
Buku Teks
edited by Burke Marshall
United States International Communication Agency, 1982
Buku Teks