Cita APA (7a ed.)

Commons, J. R. (1896). Proportional representation. T. Y. Crowell & co.

Cita Chicago Style (17a ed.)

Commons, John R. Proportional Representation. New York, Boston: T. Y. Crowell & co, 1896.

Cita MLA (8a ed.)

Commons, John R. Proportional Representation. T. Y. Crowell & co, 1896.