APA (7th ed.) Citation

Cromwell, O., Carlyle, T., & Lomas, S. C. (1904). The letters and speeches of Oliver Cromwell. Methuen.

Chicago Style (17th ed.) Citation

Cromwell, Oliver, Thomas Carlyle, and S. C. Lomas. The Letters and Speeches of Oliver Cromwell. Lond.: Methuen, 1904.

MLA (8th ed.) Citation

Cromwell, Oliver, et al. The Letters and Speeches of Oliver Cromwell. Methuen, 1904.