Cita APA (7th ed.)

Keller, A. G., & Sumner, W. G. 1. T. s. o. s. (1932). Man's rough road; backgrounds and bearings from mankind's experience. Frederick A. Stokes.

Cita Chicago (17th ed.)

Keller, Albert Galloway, i William Graham 1840-1910. The science of society Sumner. Man's Rough Road; Backgrounds and Bearings from Mankind's Experience. New York: Frederick A. Stokes, 1932.

Cita MLA (9th ed.)

Keller, Albert Galloway, i William Graham 1840-1910. The science of society Sumner. Man's Rough Road; Backgrounds and Bearings from Mankind's Experience. Frederick A. Stokes, 1932.