APA (7th ed.) Citation

Seymour, S. J. D. (1932). The Twelfth century reformation in Ireland. A.P.C.K.

Chicago Style (17th ed.) Citation

Seymour, St. John D. The Twelfth Century Reformation in Ireland. Dublin: A.P.C.K, 1932.

MLA (9th ed.) Citation

Seymour, St. John D. The Twelfth Century Reformation in Ireland. A.P.C.K, 1932.

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