Charlotte Perkins Gilman (2015). “Women and Economics - A Study of the Economic Relation Between Men and Women as a Factor in Social Evolution: From the famous American writer, feminist, social reformer and a respected sociologist who holds an important place in feminist fiction, well-known for her stories The Yellow Wallpaper and Herland”, p.29, e-artnow
Allan Sherman (1973). “The Rape of the APE (American Puritan Ethic): The Official History of the Sex Revolution, 1945-1973: the Obscening of America, an RSVP (redeeming Social Value Pornography) Document”