Poats, Rutherford M.
Brookings Institution , 1972
Buku Teks
Symonds, Richard
McGraw-Hill, 1973
Buku Teks
Kreinin, Mordechai Elihau
Praeger Inc, 1964
Buku Teks
National Planning Association, 1956
Buku Teks
Bock, Edwin A.
Public Administration Clearing House , 1954
Buku Teks