APA (7th ed.) Citation

Sitwell, G. (1961). Spiritual writers of the Middle Ages. Hawthorn Books, Publishers.

Chicago Style (17th ed.) Citation

Sitwell, Gerard. Spiritual Writers of the Middle Ages. New York: Hawthorn Books, Publishers, 1961.

MLA (9th ed.) Citation

Sitwell, Gerard. Spiritual Writers of the Middle Ages. Hawthorn Books, Publishers, 1961.

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