APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

Drinkwater, John. Oliver Cromwell. Sidgwick & Jackson, 1921.

Warning: These citations may not always be 100% accurate.