editor, Brian J. Rusbridge
Municipal Journal Limited, 1990
Buku Referensi
editor, NW Chaplin
The Ynstitute of Health Services Management, 1989
Buku Referensi
The Institute for Training in Municipal Administration by the International City Managers? Association., 1950
Buku Teks
VNU Business Publications, 1989
Buku Referensi
Webster, Donald H.
Harper & Row , 1958
Buku Teks