APA (7th ed.) Citation

Chesterton, G. K. (1956). St. Thomas Aquinas. Image Books.

Chicago Style (17th ed.) Citation

Chesterton, G. K. St. Thomas Aquinas. Garden City, N.Y.: Image Books, 1956.

MLA (8th ed.) Citation

Chesterton, G. K. St. Thomas Aquinas. Image Books, 1956.