APA (7th ed.) Citation

Cromwell, O., & Carlyle, T. (1846). Oliver Cromwell's letters and speeches (2nd ed., enl.). Chapman and Hall.

Chicago Style (17th ed.) Citation

Cromwell, Oliver, and Thomas Carlyle. Oliver Cromwell's Letters and Speeches. 2nd ed., enl. London: Chapman and Hall, 1846.

MLA (9th ed.) Citation

Cromwell, Oliver, and Thomas Carlyle. Oliver Cromwell's Letters and Speeches. 2nd ed., enl. Chapman and Hall, 1846.