APA (7th ed.) Citation

Ashley, M. (1957). The greatness of Oliver Cromwell. Macmillan.

Chicago Style (17th ed.) Citation

Ashley, Maurice. The Greatness of Oliver Cromwell. London: Macmillan, 1957.

MLA (9th ed.) Citation

Ashley, Maurice. The Greatness of Oliver Cromwell. Macmillan, 1957.