Smolensky, Jack
W B Saunders company, 1972
Buku Teks
Herman, Harold
International City Managers Association, 1968
Buku Teks
by Nigel Malin [and others]
Open University Press, 1999
Buku Teks
edited by Robert D. Newcomb, Jerry L. Jolley
Charles C. Thomas, 1980
Buku Teks
edited by Conrad Seipp. With a pref. by Cecil G. Sheps
The John Hopkins University Press , 1981
Buku Teks