APA (7th ed.) Citation

Drinkwater, J. (2005). Oliver Cromwell: A Play. Project Gutenberg.

Chicago Style (17th ed.) Citation

Drinkwater, John. Oliver Cromwell: A Play. Project Gutenberg, 2005.

MLA (9th ed.) Citation

Drinkwater, John. Oliver Cromwell: A Play. Project Gutenberg, 2005.

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