Cita APA (7a ed.)

Howells, W. W. (1946). Mankind so far. Doubleday.

Cita Chicago Style (17a ed.)

Howells, W. W. Mankind so Far. Garden City, NY: Doubleday, 1946.

Cita MLA (8a ed.)

Howells, W. W. Mankind so Far. Doubleday, 1946.