"Warren Buffett And Jeremy Grantham Are Right About Profit Margins" by Baijnath Ramraika and Prashant Trivedi, www.advisorperspectives.com. November 11, 2014.
Richard Francis Burton, John Payne, Andrew Lang, Jonathan Scott (2015). “One Thousand and One Nights - Complete Arabian Nights Collection (Delphi Classics)”, p.4187, Delphi Classics