Citazione Stile APA (7a Edizione)

Clem, A. L. (1989). Congress: Powers, processes and politics. Brooks/Cole.

Citazione stile Chigago Style (17a edizione)

Clem, Alan L. Congress: Powers, Processes and Politics. Pacific Grove, Calif: Brooks/Cole, 1989.

Citatione MLA (9a ed.)

Clem, Alan L. Congress: Powers, Processes and Politics. Brooks/Cole, 1989.