Courbet, Gustave: artchive.com citing Perl, Jed: Gallery Going: Four Seasons in the Art World, 1991, Harcourt, ISBN978-0-15-134260-0.
arthursbookshelf.com
"Archived copy"(PDF). www.arthursbookshelf.com. Archived from the original(PDF) on 7 July 2011. Retrieved 11 January 2022.{{cite web}}: CS1 maint: archived copy as title (link)
"Archived copy"(PDF). www.arthursbookshelf.com. Archived from the original(PDF) on 7 July 2011. Retrieved 11 January 2022.{{cite web}}: CS1 maint: archived copy as title (link)
youtube.com
The Troublemakers. Emma Goldman. YouTube. Archived from the original on 2021-12-12.