Snow, Edgar, author
Jarrolds, 1934
Buku Teks
Stimson, Henry L., author
Harper & Brothers, 1936
Buku Teks
Mandel, William M., author
International Secretariat Institute of Pasific Relations, 1944
Buku Teks
Clyde, Paul H. (Paul Hibbert), author
Prentice-Hall, 1948
Buku Teks
London : Pancy Lund Humpries
Majalah, Jurnal, Buletin