edited by Robert E. DiClerico, Allan S. Hammock
McGraw-Hill, 1992
Buku Teks
Irish, Marian D.
Prentice-Hall, 1962
Buku Teks
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
Moore, John A.
Macmillan Publishing Company, 1985
Buku Teks
Starling, Grover
The Dorsey Press, 1982
Buku Teks