Gange, John
Public Administration Clearing House, 1953
Buku Teks
Cohen, Elaine, 1938-, author
McGraw-Hill, 1993
Buku Teks
Diebold, John
American Management Association, 1985
Buku Teks
Finkbeiner, Betty Ladley, 1939-, author
Mosby, 1991
Buku Teks
Attridge, Catherina M., author
McGraw-Hill, 1983
Buku Teks