Baldwin, Robert (1987). “Politics, Nature, and the Dignity of Man in Piero Della Francesca's Portraits of Battista Sforza and Federico da Montefeltro”. Source: Notes in the History of Art6 (3): 14–19. doi:10.1086/sou.6.3.23202317. ISSN0737-4453.
Dorra, Henri; Hartt, Frederick; Spencer, Harold; Rothschild, Lincoln (1978). “Art, a History of Painting-Sculpture-Architecture”. Art Journal37 (4): 353. doi:10.2307/776052. ISSN0004-3249. JSTOR776052.
jstor.org
Dorra, Henri; Hartt, Frederick; Spencer, Harold; Rothschild, Lincoln (1978). “Art, a History of Painting-Sculpture-Architecture”. Art Journal37 (4): 353. doi:10.2307/776052. ISSN0004-3249. JSTOR776052.
Baldwin, Robert (1987). “Politics, Nature, and the Dignity of Man in Piero Della Francesca's Portraits of Battista Sforza and Federico da Montefeltro”. Source: Notes in the History of Art6 (3): 14–19. doi:10.1086/sou.6.3.23202317. ISSN0737-4453.
Dorra, Henri; Hartt, Frederick; Spencer, Harold; Rothschild, Lincoln (1978). “Art, a History of Painting-Sculpture-Architecture”. Art Journal37 (4): 353. doi:10.2307/776052. ISSN0004-3249. JSTOR776052.