Cita APA (7a ed.)

Willoughby, W. W., & Rogers, L. 1. (1924). An Introduction to the Problem of Government. Doubleday Page & Co..

Cita Chicago Style (17a ed.)

Willoughby, Westel Woodbury, y Lindsay 1891 Rogers. An Introduction to the Problem of Government. New York: Doubleday Page & Co., 1924.

Cita MLA (9a ed.)

Willoughby, Westel Woodbury, y Lindsay 1891 Rogers. An Introduction to the Problem of Government. Doubleday Page & Co., 1924.