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.873, e-artnow
Jack Canfield, Mark Victor Hansen, Amy Newmark (2011). “Chicken Soup for the Soul: Preteens Talk: Inspiration and Support for Preteens from Kids Just Like Them”, p.349, Simon and Schuster
Henry Wadsworth Longfellow (1888). “Longfellow's Days: The Longfellow Prose Birthday Book : Extracts from the Journals and Letters of H. W. Longfellow”