Badeau, John S.
Foreign Policy Ass., 1943
Buku Teks SO
edited by Gun Lauritzson
Lund University, 1992
Buku Referensi
Braude, Eric J.
John Wiley & Sons, 2011
Buku Teks SO
Toynbee, Arnold J.
Oxford University Press, 1958
Buku Teks
Roma : Istituto Iataliano per IlMedio ed Estremo Oriente
Majalah, Jurnal, Buletin