Cita APA (7th ed.)

Howells, W. W. (1954). Back of history: The story of our own origins. Doubleday.

Cita Chicago (17th ed.)

Howells, William White. Back of History: The Story of Our Own Origins. Garden City, N.Y: Doubleday, 1954.

Cita MLA (9th ed.)

Howells, William White. Back of History: The Story of Our Own Origins. Doubleday, 1954.