Hoyt, Edwin C.
Martinus Nijhoff , 1959
Buku Teks
Lijnzaad, Liesbeth
Martinus Nijhoff Publishers, 1995
Buku Teks
edited by Michael Lang [and others]
Cambridge University Press, 2012
Buku Teks
United Nations, 1971
Buku Teks
Vandevelde, Kenneth J. , author
Oxford University Press, 2010
Buku Teks