Gaya APA

May, W, E. (1995). Marriage: The rock on which the family is built. Foreword by Alfonso López Trujillo. . San Francisco: San Francisco Ignatius Press.

Gaya MLA

May, William, E.. "Marriage: The rock on which the family is built. Foreword by Alfonso López Trujillo. ". San Francisco: San Francisco Ignatius Press, 1995. Buku.