Wheare, K. C.
Oxford University Press, 1963
Buku Teks
Maheshwari, Shriram
The Indian Institute of Public Administration, 1972
Buku Teks
Locke, John, author
The Bobbs-Merrill Company, Inc, 1952
Buku Teks
Roche, John P.
McGraw-Hill, 1954
Buku Teks
Mill, John Stuart
E.P. Dutton and Company, 1955
Buku Teks