APA (7th ed.) Citation

Blunt, J. H. (2007). A Key to the Knowledge of Church History (Ancient). Project Gutenberg.

Chicago Style (17th ed.) Citation

Blunt, John Henry. A Key to the Knowledge of Church History (Ancient). Project Gutenberg, 2007.

MLA (9th ed.) Citation

Blunt, John Henry. A Key to the Knowledge of Church History (Ancient). Project Gutenberg, 2007.

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