Vann, G. (1998). At the foot of the cross: The seven lessons of Mary for the sorrowing heart. Sophia Institute Press.
Chicago-viite (17. p.)Vann, Gerald. At the Foot of the Cross: The Seven Lessons of Mary for the Sorrowing Heart. Manchester, N.H.: Sophia Institute Press, 1998.
MLA-viite (8. p.)Vann, Gerald. At the Foot of the Cross: The Seven Lessons of Mary for the Sorrowing Heart. Sophia Institute Press, 1998.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.