APA (7th ed.) Citation

Mariani, P. L. (2003). Thirty days: On retreat with the Exercises of St. Ignatius. Penguin Compass.

Chicago Style (17th ed.) Citation

Mariani, Paul L. Thirty Days: On Retreat with the Exercises of St. Ignatius. New York: Penguin Compass, 2003.

MLA (8th ed.) Citation

Mariani, Paul L. Thirty Days: On Retreat with the Exercises of St. Ignatius. Penguin Compass, 2003.