APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Ashley, Maurice. The Greatness of Oliver Cromwell. N. Y: Collier Books, 1957.

MLA (9th ed.) Citation

Ashley, Maurice. The Greatness of Oliver Cromwell. Collier Books, 1957.

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