Harrigan, John J.
Politics and the American future / John J. Harrigan
Little, Brown & Co., 1984
 Buku Teks SO
Cassedy, James H.
Demography in Early America : beginings of statistical mind, 1600-1800 / James Cassedy
Harvard University Press, 1969
 Buku Teks
Goetzmann, William H.
New lands, new men : America and the second great age of discovery
Viking, 1986
 Buku Teks SO
Kampelman, Max M.
The Communist vs the C.I.O. a study in power politics / Max M. Kampelman
Frederick A. Praeger, 1957
 Buku Teks SO
Harrigan, John J.
Politics and policy in states and communities / John J. Harrigan
Little, Brown & Co., 1984
 Buku Teks SO