Boeke, Hendrik Enno., author
Leiden Universitaire Pers 1948
Buku Teks
Gardner, D.H.
New York: Institute of Pasific Relations, 1950
Buku Teks
Griswold, Alfred Whitney, 1906-1963, author
Brace, 1939
Buku Teks
London : Pancy Lund Humpries
Majalah, Jurnal, Buletin
Roosevelt, Kermit
Buku Teks