Heale, M. J., author
An imprint of Bloomsbury Publishing Plc, 2015
Buku Teks
Lowi, Theodore J.
Basic books, 1971
Buku Teks
Woll, Peter, author
Little, Brown, 1982
Buku Teks
Irish, Marian D., author
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