Saing, Soe
Institute of Southeast Asian Studies, 1990
Buku Teks
Poats, Rutherford M.
Brookings Institution , 1972
Buku Teks
Symonds, Richard
McGraw-Hill, 1973
Buku Teks
Kreinin, Mordechai E. (Mordechai Elihau), author
Praeger Inc, 1964
Buku Teks
National Planning Association, 1956
Buku Teks