"Foundations," in "A brief overview of our parish history." Philadelphia, Pennsylvania: St. William Roman Catholic Church (website), retrieved online February 17, 2019.
"Rectory" and "Convent," in "A brief overview of our Parish history." Philadelphia, Pennsylvania: St. William Roman Catholic Church (website), retrieved online February 17, 2019.
"Notable Parishioners," in "A brief overview of our Parish history." Philadelphia, Pennsylvania: St. William Roman Catholic Church (website), retrieved online February 17, 2019.
Photo of Monsignor James Mortimer in St. William's new kindergarten classroom (photo with caption). Philadelphia, Pennsylvania: The Inquirer, November 22, 1987, p. 518; subscription required).