APA (7th ed.) Citation

Levison, W. (1949). England and the Continent in the eighth century. Oxford University Press.

Chicago Style (17th ed.) Citation

Levison, Wilhelm. England and the Continent in the Eighth Century. London: Oxford University Press, 1949.

MLA (9th ed.) Citation

Levison, Wilhelm. England and the Continent in the Eighth Century. Oxford University Press, 1949.