APA (7th ed.) Citation

Dalberg-Acton,. (1926). Lectures on modern history. Macmillan,.

Chicago Style (17th ed.) Citation

Dalberg-Acton. Lectures on Modern History. London: Macmillan,, 1926.

MLA (9th ed.) Citation

Dalberg-Acton. Lectures on Modern History. Macmillan,, 1926.