Παραπομπή σε μορφή APA (7η εκδ.)

Frey, W. N. (1931). The act of religious profession: A brief historical synopsis and commentary. Catholic University of America.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Frey, Wolfgang Norbert. The Act of Religious Profession: A Brief Historical Synopsis and Commentary. Washington, D.C.: Catholic University of America, 1931.

Παραπομπή σε μορφή MLA (8th εκδ.)

Frey, Wolfgang Norbert. The Act of Religious Profession: A Brief Historical Synopsis and Commentary. Catholic University of America, 1931.