"Giotto's date of birth differs widely in the sources, but modern art historians consider 1267 to be the most plausible, although the years up to 1275 cannot be entirely discounted." Wolf, Norbert . Giotto di Bondone, 1267–1337: The Renewal of Painting. Hong Kong: Taschen. 2006. стр. 92. ISBN978-3822851609.
Hodge, Susie (новембар 2016). Art in Detail: 100 Masterpieces (1 изд.). New York: Thames & Hudson. стр. 10. ISBN978-0-500-23954-4. „He worked during the period described as Gothic or Pre-Renaissance ...”CS1 одржавање: Формат датума (веза)
