Παραπομπή σε μορφή APA (7η εκδ.)

(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].

Παραπομπή σε μορφή Chicago (17η εκδ.)

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.

Παραπομπή σε μορφή MLA (8th εκδ.)

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.