Joannides, P. (2015). Drawings by Raphael and his immediate followers made for or employed for engravings and chiaroscuro woodcuts. Raffael als Zeichner : die Beiträge des Frankfurter Kolloquiums.
Chicago-referens (17:e uppl.)Joannides, Paul. "Drawings by Raphael and His Immediate Followers Made for or Employed for Engravings and Chiaroscuro Woodcuts." Raffael Als Zeichner : Die Beiträge Des Frankfurter Kolloquiums 2015.
MLA-referens (8:e uppl.)Joannides, Paul. "Drawings by Raphael and His Immediate Followers Made for or Employed for Engravings and Chiaroscuro Woodcuts." Raffael Als Zeichner : Die Beiträge Des Frankfurter Kolloquiums, 2015.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.