APA (7e ed.) Bronvermelding

Billy, M. C. (1954). Customs O.F.M.Conv. Conventual Franciscan Publications.

Chicago (17e ed.) Bronvermelding

Billy, Method C. Customs O.F.M.Conv. Rensselaer, N.Y.: Conventual Franciscan Publications, 1954.

MLA (8e ed.) Bronvermelding

Billy, Method C. Customs O.F.M.Conv. Conventual Franciscan Publications, 1954.