Tokyo : The Japan Institute of International Affairs
Majalah, Jurnal, Buletin
Gathorne-Hardy, G.M., author
Oxford University Press, 1952
Buku Teks
the Department of Foreign Affairs,
Majalah, Jurnal, Buletin
Artikel Jurnal
National Library of Australia, 1993
Majalah, Jurnal, Buletin