A history of painting in Italy: Umbria, Florence and Siena from the second to the sixteenth century, J.A. Crowe & G.B. Cavalcaselle. Edited by Langton Douglas, asisten by S. Arthur Strong
Crowe, J. A. (Joseph Archer), 1825-1896; Cavalcaselle, G. B. (Giovanni Battista), 1820-1897; Douglas, R. Langton (Robert Langton), 1864-1951; Strong, Sandford Arthur, 1863-1904; Nicola, G. de; Borenius, Tancred, 1885-1948