Coward, Barry. Cromwell. London:
Longman, 1991.
Hill, Christopher. God's Englishman:
Oliver Cromwell and the English Revolution. New York:
Harper & Row, Publishers, 1970.
Hirst, Derek. Authority and Conflict:
England, 1603–1658. Cambridge, MA: Harvard University
Press, 1986.
Morrill, John. Oliver Cromwell and the
English Revolution. London: Longman, 1990.