Goeltom, Miranda S.
Gramedia Pustaka Utama , 2007
Buku Teks SO
Arnold, H.J.P.
Dufour Editions, 1966
Buku Teks
edited by William D. Grampp and Emanuel T. Weiler
Richard D. Irwin, 1953
Buku Teks
Mason, Edward S.
Published for the Council on Foreign Relations by Harper & Row, 1964
Buku Teks
McNeill, Desmond
Croom Helm, 1981
Buku Teks SO