Muller, Joachim W., author
Oceana Publications, 1992
Buku Referensi
Muller, Joachim W., author
Oceana Publications, 1992
Buku Referensi
United Nations. Department of Public Information
United Nations. Department of Public Information, 1994
Buku Referensi
edited by Louis B. Sohn
Foundation Press, 1967
Buku Teks
Soward, F. H.
Manhattan Publishing Copany, 1956
Buku Teks