APA (7th ed.) Citation

Gwatkin, H. M. (1974). Early church history to A.D. 313. [AMS Press].

Chicago Style (17th ed.) Citation

Gwatkin, Henry Melvill. Early Church History to A.D. 313. [New York]: [AMS Press], 1974.

MLA (9th ed.) Citation

Gwatkin, Henry Melvill. Early Church History to A.D. 313. [AMS Press], 1974.

Warning: These citations may not always be 100% accurate.