Cita APA (7a ed.)

Woll, P., & Zimmerman, S. E. (1992). American government: The core (2nd ed.). McGraw-Hill.

Cita Chicago Style (17a ed.)

Woll, Peter, y Sidney E. Zimmerman. American Government: The Core. 2nd ed. New York [etc.]: McGraw-Hill, 1992.

Cita MLA (9a ed.)

Woll, Peter, y Sidney E. Zimmerman. American Government: The Core. 2nd ed. McGraw-Hill, 1992.