Opportunity Quotes - Page 237
"Futurewise". Book by David Perkins, 1998.
Orson Scott Card (2009). “Prentice Alvin: The Tales of Alvin Maker”, p.213, Macmillan
Orison Swett Marden (2015). “ORISON SWETT MARDEN Premium Collection - Wisdom & Empowerment Series (18 Books in One Volume): Steps to Success and Power, How to Get What You Want, An Iron Will, Be Good to Yourself, Every Man A King, Keeping Fit, Prosperity – How to Attract It, Stepping-Stones To Fame And Fortune...”, p.97, e-artnow
Oprah Winfrey, Janet Lowe (1998). “Oprah Winfrey speaks: insight from the world's most influential voice”, John Wiley & Sons