Bernard Duhaime
Cambridge University Press , 2017
Artikel Jurnal
Costello, Cathryn.
Oxford University Press, 2016
Buku Teks
Selby, David
Cambridge University Press, 1988
Buku Teks
Unesco, 1970
Buku Teks
edited by Ian Brownlie, Guy S. Goodwin-Gill
Clarendon Press, 1971
Buku Teks