Frey, W. N. (1931). The act of religious profession: A brief historical synopsis and commentary. Catholic University of America.
Lua i Stíl Chicago (17ú heag.)Frey, Wolfgang Norbert. The Act of Religious Profession: A Brief Historical Synopsis and Commentary. Washington, D.C.: Catholic University of America, 1931.
Lua MLA (8ú heag.)Frey, Wolfgang Norbert. The Act of Religious Profession: A Brief Historical Synopsis and Commentary. Catholic University of America, 1931.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.