APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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