Cita APA (7a ed.)

Welch, S. (1990). American government (3. ed.). West.

Cita Chicago Style (17a ed.)

Welch, Susan. American Government. 3. ed. [s.l.]: West, 1990.

Cita MLA (9a ed.)

Welch, Susan. American Government. 3. ed. West, 1990.