APA (7th ed.) Citation

Firth, J. B. (1971). Constantine the Great: The reorganisation of the Empire and the triumph of the Church. Books for Libraries Press.

Chicago Style (17th ed.) Citation

Firth, John B. Constantine the Great: The Reorganisation of the Empire and the Triumph of the Church. Freeport, N.Y.: Books for Libraries Press, 1971.

MLA (9th ed.) Citation

Firth, John B. Constantine the Great: The Reorganisation of the Empire and the Triumph of the Church. Books for Libraries Press, 1971.