Cita APA (7a ed.)

Downs, R. B. (1964). Famous books, ancient and medieval. Barnes & Noble.

Cita Chicago Style (17a ed.)

Downs, Robert B. Famous Books, Ancient and Medieval. New York: Barnes & Noble, 1964.

Cita MLA (8a ed.)

Downs, Robert B. Famous Books, Ancient and Medieval. Barnes & Noble, 1964.