(1920). International Congress of Gregorian Chant: Held at the Metropolitan Cathedral Church of St. Patrick, New York, on June 1st, 2nd and 3rd, 1920. [publisher not identified].
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)International Congress of Gregorian Chant: Held at the Metropolitan Cathedral Church of St. Patrick, New York, on June 1st, 2nd and 3rd, 1920. New York: [publisher not identified], 1920.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)International Congress of Gregorian Chant: Held at the Metropolitan Cathedral Church of St. Patrick, New York, on June 1st, 2nd and 3rd, 1920. [publisher not identified], 1920.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.