Copeland, Melvin T.
The executive at work
Harvard University Press, 1955
 Buku Teks
Copeland, Melvin T.
The executive at work
Harvard University Press, 1955
 Buku Teks SO
Report of the advisory committee on executive government
Commonwealth of Australia, 1987
 Buku Teks SO
Folsom, Marison B.
Executive decision making :observations and experience in business and government
McGraw-Hill, 1962
 Buku Teks
Wiseman, H. Victor
Local Government at Work
Routledge and Kegan Paul, 1967
 Buku Teks