Outlines of the history of art, Volume 2. By Wilhelm Lübke, edited by William Sturgis, Dodd, Mead, and company, New York, page 445 Google Books
Emilio Bacciotti, Bacciotti's Handbook of Florence and Its Environs, Or, The Stranger Conducted Through Its Principal Monuments, Studios, Churches, Palaces, Galleries, Streets and Shops, Tipografia Mariani, 1885. Google Books
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La Statua della Libertà di New York? Ispirata da un'opera che si trova a FirenzeOnline
