Παραπομπή σε μορφή APA (7η εκδ.)

Exler, F. X. J. (1923). The form of the ancient Greek letter: A study in Greek epistolography. Catholic University of America.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Exler, Francis Xavier J. The Form of the Ancient Greek Letter: A Study in Greek Epistolography. Washington, D.C.: Catholic University of America, 1923.

Παραπομπή σε μορφή MLA (8th εκδ.)

Exler, Francis Xavier J. The Form of the Ancient Greek Letter: A Study in Greek Epistolography. Catholic University of America, 1923.