*{{Cite book|first= Sydney J.|last= Freedberg|year=1993|title= Painting in Italy, 1500-1600|chapter=|editor= Pelican History of Art|others=|pages=90–95 Penguin Books Ltd|publisher=|id=|url=|authorlink=}}
*{{Cite book|first= James R.|last= Hobbes|year= 1849|title=Picture collector's manual; Dictionary of Painters|editor = |pages=|publisher= T. & W. Boone, 29 Bond Street, London; Digitized by Googlebooks (2006) from Oxford library|id=|url= http://books.google.com/books?q=intitle:picture+intitle:collector's|authorlink=}}
