Cita APA (7a ed.)

William, N. (1951). An outline of the science of political economy. Allen & Unwin.

Cita Chicago Style (17a ed.)

William, Nassau. An Outline of the Science of Political Economy. London: Allen & Unwin, 1951.

Cita MLA (9a ed.)

William, Nassau. An Outline of the Science of Political Economy. Allen & Unwin, 1951.