APA (7th ed.) Citation

Chesterton, G. K. (1957). St. Francis of Assisi. Image Books.

Chicago Style (17th ed.) Citation

Chesterton, Gilbert Keith. St. Francis of Assisi. Garden City, N.Y: Image Books, 1957.

MLA (9th ed.) Citation

Chesterton, Gilbert Keith. St. Francis of Assisi. Image Books, 1957.

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