APA (7th ed.) Citation

Doncaster, I., & Bullard, I. (1969). The Roman occupation of Britain. Longmans.

Chicago Style (17th ed.) Citation

Doncaster, Islay, and Ivan Bullard. The Roman Occupation of Britain. London: Longmans, 1969.

MLA (9th ed.) Citation

Doncaster, Islay, and Ivan Bullard. The Roman Occupation of Britain. Longmans, 1969.