Howard, R. J. (1959). Liturgical retreat. Sheed and Ward.
Chicago Style aipamenaHoward, Roy J. Liturgical Retreat. New York: Sheed and Ward, 1959.
MLA aipamenaHoward, Roy J. Liturgical Retreat. Sheed and Ward, 1959.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.