APA (7th ed.) Citation

Richmond, I. A. (1963). Roman Britain (2a. ed.). Penguin Books.

Chicago Style (17th ed.) Citation

Richmond, I. A. Roman Britain. 2a. ed. Londres: Penguin Books, 1963.

MLA (9th ed.) Citation

Richmond, I. A. Roman Britain. 2a. ed. Penguin Books, 1963.