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.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)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.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)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.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.