APA (7th ed.) Citation

Sitwell, G. (1961). Spiritual writers of the Middle Ages ([1st ed.].). Hawthorn Books.

Chicago Style (17th ed.) Citation

Sitwell, Gerard. Spiritual Writers of the Middle Ages. [1st ed.]. New York: Hawthorn Books, 1961.

MLA (9th ed.) Citation

Sitwell, Gerard. Spiritual Writers of the Middle Ages. [1st ed.]. Hawthorn Books, 1961.