Dordrecht Martinus Nijhoff, 1992
Buku Teks
United Nations , [date of publication not identified]
Buku Teks
Loring, Rosalind
Van Nostrand Reinhold Co, 1972
Buku Teks
Zichy, Shoya, author
McGraw-Hill , 2001
Buku Teks
United Nations, [date of publication not identified]
Buku Teks