APA (7th ed.) Citation

(1920). Little key of heaven: A manual of prayers and instructions for catholics. First Communion Day. Epistles and Gospels. Catholic Publication Press.

Chicago Style (17th ed.) Citation

Little Key of Heaven: A Manual of Prayers and Instructions for Catholics. First Communion Day. Epistles and Gospels. New York: Catholic Publication Press, 1920.

MLA (9th ed.) Citation

Little Key of Heaven: A Manual of Prayers and Instructions for Catholics. First Communion Day. Epistles and Gospels. Catholic Publication Press, 1920.