(2013). United States – Illinois – Lake Forest – Convent of the Sacred Heart – View of the Grotto in Winter. Digital USD.
Chicago-referens (17:e uppl.)United States – Illinois – Lake Forest – Convent of the Sacred Heart – View of the Grotto in Winter. Digital USD, 2013.
MLA-referens (8:e uppl.)United States – Illinois – Lake Forest – Convent of the Sacred Heart – View of the Grotto in Winter. Digital USD, 2013.
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