APA (7th ed.) Citation

Milner, J. (1925). Key of Heaven: A manual of prayers and instructions for Catholics. Catholic publ. press.

Chicago Style (17th ed.) Citation

Milner, John. Key of Heaven: A Manual of Prayers and Instructions for Catholics. New York: Catholic publ. press, 1925.

MLA (8th ed.) Citation

Milner, John. Key of Heaven: A Manual of Prayers and Instructions for Catholics. Catholic publ. press, 1925.