Gaya APA

Cowan, M, /, F, J, C. (1993). Companions in grace. A handbook for directors of the Spiritual Exercises of St. Ignatius of Loyola. . Kansas City: Kansas City Sheed & Ward.

Gaya MLA

Cowan, Marian, /, Futrell,, John, Carroll. "Companions in grace. A handbook for directors of the Spiritual Exercises of St. Ignatius of Loyola. ". Kansas City: Kansas City Sheed & Ward, 1993. Buku.