Villefranche, J. M., & Martin, L. Life of Don Bosco: Founder of the Salesian Society (2nd ed.). Burns & Oates ; Catholic Publication Society.
Chicago-referens (17:e uppl.)Villefranche, Jacques Melchior, och Lady Martin. Life of Don Bosco: Founder of the Salesian Society. 2nd ed. London : New York: Burns & Oates ; Catholic Publication Society.
MLA-referens (8:e uppl.)Villefranche, Jacques Melchior, och Lady Martin. Life of Don Bosco: Founder of the Salesian Society. 2nd ed. Burns & Oates ; Catholic Publication Society.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.