Citazione Stile APA (7a Edizione)

Olivi, P. J., & Karris, R. J. (2012). Spiritual warfare and six other spiritual writings. Franciscan Institute Publications.

Citazione stile Chigago Style (17a edizione)

Olivi, Pierre Jean, e Robert J. Karris. Spiritual Warfare and Six Other Spiritual Writings. St. Bonaventure, New York: Franciscan Institute Publications, 2012.

Citatione MLA (9a ed.)

Olivi, Pierre Jean, e Robert J. Karris. Spiritual Warfare and Six Other Spiritual Writings. Franciscan Institute Publications, 2012.