Παραπομπή σε μορφή APA (7η εκδ.)

O'Hara, G. P. (1935). Printed, Form Letter. Invitation, To: ACHS Lecture, "The Flight of the Catholic Church in Mexico," by Sophia Del Valle, January 9, 1935.

Παραπομπή σε μορφή Chicago (17η εκδ.)

O'Hara, Gerald P. Printed, Form Letter. Invitation, To: ACHS Lecture, "The Flight of the Catholic Church in Mexico," by Sophia Del Valle, January 9, 1935. 1935.

Παραπομπή σε μορφή MLA (8th εκδ.)

O'Hara, Gerald P. Printed, Form Letter. Invitation, To: ACHS Lecture, "The Flight of the Catholic Church in Mexico," by Sophia Del Valle, January 9, 1935. 1935.