Παραπομπή σε μορφή APA (7η εκδ.)

Heylen, L. (1865). The progress of the age, and the danger of the age: Two lectures delivered before the St. Xavier Conference of the St. Vincent de Paul Brotherhood in the hall of St. Louis University. J. P. Walsh.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Heylen, Louis. The Progress of the Age, and the Danger of the Age: Two Lectures Delivered Before the St. Xavier Conference of the St. Vincent De Paul Brotherhood in the Hall of St. Louis University. Cincinnati: J. P. Walsh, 1865.

Παραπομπή σε μορφή MLA (8th εκδ.)

Heylen, Louis. The Progress of the Age, and the Danger of the Age: Two Lectures Delivered Before the St. Xavier Conference of the St. Vincent De Paul Brotherhood in the Hall of St. Louis University. J. P. Walsh, 1865.