Cita APA (7a ed.)

Downer, A. S. (1951). Fifty years of American drama, 1900-1950. Henry Regnery.

Cita Chicago Style (17a ed.)

Downer, Alan S. Fifty Years of American Drama, 1900-1950. Chicago: Henry Regnery, 1951.

Cita MLA (9a ed.)

Downer, Alan S. Fifty Years of American Drama, 1900-1950. Henry Regnery, 1951.