@book{87754,
	author = {Leonardo, da Vinci, and Hawkins, John Sidney,},
	title = {A Treatise on Painting},
	publisher = {Project Gutenberg,},
	year = {2014},
	address = {Salt Lake City, UT :},
	note = {Wikipedia page about this book: https://en.wikipedia.org/wiki/A_Treatise_on_Painting},
	url = {https://www.gutenberg.org/ebooks/46915}
}