Thuis, S. (1952). Gregorian chant: A barometer of religious fervor in the Catholic Church. Grail Publication.
Lua i Stíl Chicago (17ú heag.)Thuis, Stephen. Gregorian Chant: A Barometer of Religious Fervor in the Catholic Church. St. Meinrad, Ind.: Grail Publication, 1952.
Lua MLA (8ú heag.)Thuis, Stephen. Gregorian Chant: A Barometer of Religious Fervor in the Catholic Church. Grail Publication, 1952.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.