APA (7th ed.) Citation

Acton, J. E. E. D. (1911). The Cambridge modern history. University Press.

Chicago Style (17th ed.) Citation

Acton, John Emerich Edward Dalberg. The Cambridge Modern History. Cambridge: University Press, 1911.

MLA (9th ed.) Citation

Acton, John Emerich Edward Dalberg. The Cambridge Modern History. University Press, 1911.