APA (7th ed.) Citation

Drinkwater, J. (1921). Oliver Cromwell: A play. Sidgwick & Jackson.

Chicago Style (17th ed.) Citation

Drinkwater, John. Oliver Cromwell: A Play. London: Sidgwick & Jackson, 1921.

MLA (8th ed.) Citation

Drinkwater, John. Oliver Cromwell: A Play. Sidgwick & Jackson, 1921.