APA (7th ed.) Citation

Gwatkin, H. M. (1911). The Cambridge medieval history. Cambridge University Press.

Chicago Style (17th ed.) Citation

Gwatkin, Henry Melvill. The Cambridge Medieval History. Cambridge, Eng.: Cambridge University Press, 1911.

MLA (8th ed.) Citation

Gwatkin, Henry Melvill. The Cambridge Medieval History. Cambridge University Press, 1911.