(1940). Key of heaven: A manual of prayers and instructions for Catholics, in accordance with recent pontifical decrees. Catholic Book Pub. Co..
Chicago-Zitierstil (17. Ausg.)Key of Heaven: A Manual of Prayers and Instructions for Catholics, in Accordance with Recent Pontifical Decrees. New York: Catholic Book Pub. Co., 1940.
MLA-Zitierstil (8. Ausg.)Key of Heaven: A Manual of Prayers and Instructions for Catholics, in Accordance with Recent Pontifical Decrees. Catholic Book Pub. Co., 1940.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.