APA (7th ed.) Citation

Gilson, É. (1955). History of christian philosophy in the Middle Ages ([1st pub.].). Sheed and Ward.

Chicago Style (17th ed.) Citation

Gilson, Étienne. History of Christian Philosophy in the Middle Ages. [1st pub.]. London: Sheed and Ward, 1955.

MLA (9th ed.) Citation

Gilson, Étienne. History of Christian Philosophy in the Middle Ages. [1st pub.]. Sheed and Ward, 1955.

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