Catholic Church. Congregatio pro Doctrina Fidei. (1989). Letter to the bishops of the Catholic Church on some aspects of Christian meditation. St. Paul Books & Media.
Lua i Stíl Chicago (17ú heag.)Catholic Church. Congregatio pro Doctrina Fidei. Letter to the Bishops of the Catholic Church on Some Aspects of Christian Meditation. Boston: St. Paul Books & Media, 1989.
Lua MLA (8ú heag.)Catholic Church. Congregatio pro Doctrina Fidei. Letter to the Bishops of the Catholic Church on Some Aspects of Christian Meditation. St. Paul Books & Media, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.