@book{77361,
	author = {Williamson, George C.,},
	title = {Pietro Vannucci, called Perugino},
	publisher = {Project Gutenberg,},
	year = {2011},
	series = {The great masters in painting and sculpture},
	address = {Salt Lake City, UT :},
	note = {Release date is 2011-06-25},
	url = {https://www.gutenberg.org/ebooks/36521}
}