Grant, Murray, 1926
Lea & Febiger, 1987
Buku Teks
Herman, Harold
International City Managers Association, 1968
Buku Teks
Gray, Stephen E.
MacMillan Press , 1978
Buku Teks
Smolensky, Jack
W B Saunders company, 1972
Buku Teks
edited by Conrad Seipp. With a pref. by Cecil G. Sheps
The John Hopkins University Press , 1981
Buku Teks