Chant, Christopher
Chancellor Press , 1999
Buku Referensi
by Department of External Affairs Canada
Department of External Affairs, 1963
Buku Teks SO
Gage, John D.
Cambridge University Press, 1992
Buku Teks SO
Nordquist, Myron H.
Martinus Nijhoff , 2009
Multimedia
Myron H. Nordquist, Tommy T.B. Koh , John Norton Moore
Martinus NijHoff, 2009
Buku Teks