Wilson, James Q.
American government : institutions and policies
D.C. Heath, 1995
 Buku Teks
Wilson, James Q.
American government: institutions and policies
D.C. Helath and Co., 1986
 Buku Teks
American democracy institutions, politics, and policies
by William J. Keefe ... [and others]
The Dorsey Press, 1983
 Buku Teks
Dolbeare, Kenneth M.
American politics : policies, power, and change
D.C. Heath, 1985
 Buku Teks
Macpherson, Gavin
Highway and trasportation engineering and planning
Longman, 1993
 Buku Teks