Cita APA (7a ed.)

Roberts, P. (1920). The problem of Americanization. Macmillan.

Cita Chicago Style (17a ed.)

Roberts, Peter. The Problem of Americanization. New York: Macmillan, 1920.

Cita MLA (8a ed.)

Roberts, Peter. The Problem of Americanization. Macmillan, 1920.