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
Wynia, Gary W., author
Cambridge University Press , 1984
Buku Teks
Bone, Hugh A., author
McGraw-Hill, 1965
Buku Teks
edited by Edward Conrad Smith and Arnold John Zurcher
Barnes & Noble, 1966
Buku Teks