Brian Kolodiejchuk, Mother Teresa (2012). “Mother Teresa: Come Be My Light: The revealing private writings of the Nobel Peace Prize winner”, p.33, Random House
Charles Simeon, William Carus, Charles Pettit McIivaine (Bp.), Daniel Wilson (1847). “Memoirs of the life of the Rev. Charles Simeon ...: with a selection from his writings and correspondence”, p.518