Jabarkan The Cromwell Association dari Oliver Cromwell

The Cromwell Museum in Huntingdon

Chronology of Oliver Cromwell World History Database

Biography at the British Civil Wars & Commonwealth website

London Gazette report on the trial and execution of Charles I

London Gazette report on the death of Oliver Cromwell

Vallely, Paul. The Big Question: Was Cromwell a revolutionary hero or a genocidal war criminal?, The Independent 4 September 2008.

The Cromwellian Catastrophe in Ireland:an Historiographical Analysis (an overview of writings/writers on the subject by Jameel Hampton pub. Gateway An Academic Journal on the Web: Spring 2003 PDF)

An Interview with a conservator from the Library of Congress who conserved a document that bears the signature of Oliver Cromwell