Cita APA (7th ed.)
Johnson, P. E., Aldrich, J. H., & Miller, G. J. (1990). American government: People, institutions, and policies (2nd ed.). Houghton mifflin.
Cita Chicago (17th ed.)
Johnson, Paul E., John H. Aldrich, i Gary J. Miller. American Government: People, Institutions, and Policies. 2nd ed. Dallas: Houghton mifflin, 1990.
Cita MLA (9th ed.)
Johnson, Paul E., et al. American Government: People, Institutions, and Policies. 2nd ed. Houghton mifflin, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.