APA (7th ed.) Citation

Graham, H. G. (1922). Purgatory. Catholic Truth Society.

Chicago Style (17th ed.) Citation

Graham, Henry Grey. Purgatory. London: Catholic Truth Society, 1922.

MLA (8th ed.) Citation

Graham, Henry Grey. Purgatory. Catholic Truth Society, 1922.

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