Locke, John, author
A Mentor Books, 1965
Buku Teks
Ryan, Neal
QUT, 2003
Multimedia
edited by Pietro S. Nivola, David H. Rosenbloom ; with forewords by Nelson W. Polsby and Theodore J. Lowi
St. Martin's Press, 1990.
Buku Teks
edited by Nimrod Raphaeli
Allyn and Bacon, 1967
Buku Teks
Good, Yohn M
Heath, 1970
Buku Teks