Treat, Payson J., author
Peter Smith, 1963
Buku Teks
Embassy of The Republic of Indonesia
Embassy of The Republic of Indonesia, 2009
Buku Teks
Gardner, Paul F., author
1999
Artikel Jurnal
Calvocoressi, Peter
Longman, 1991
Buku Teks
Taylor, Phillip M., author
Routledge, 1997
Buku Teks