APA (7th ed.) Citation

Phelps, W. L. (1968). The twentieth century theatre: Observations on the contemporary English and American stage. Kennikat Press.

Chicago Style (17th ed.) Citation

Phelps, William Lyon. The Twentieth Century Theatre: Observations on the Contemporary English and American Stage. Port Washington, N.Y.,: Kennikat Press, 1968.

MLA (8th ed.) Citation

Phelps, William Lyon. The Twentieth Century Theatre: Observations on the Contemporary English and American Stage. Kennikat Press, 1968.