William Cowper, Robert Southey (1854). “The Works: Comprising His Poems, Correspondence and Translations : in Eight Volumes. ¬The poetical works, Vol. 1”, p.119
George Washington, John Clement Fitzpatrick, David Maydole Matteson (1784). “The Writings of George Washington from the Original Manuscript Sources, 1745-1799”, p.1
Ralph Waldo Emerson (2010). “Essays and English Traits by Ralph Waldo Emerson: The Five Foot Shelf of Classics, Vol. V (in 51 Volumes)”, p.134, Cosimo, Inc.
Wallace D. Wattles (2015). “Wallace D. Wattles Ultimate Collection – 10 Books in One Volume: The Science of Getting Rich, The Science of Being Well, The Science of Being Great, How to Get What You Want and more: From one of the New Thought pioneers, author of Making of the Man Who Can or How to Promote Yourself and New Science of Living and Healing or Health Through New Thought and Fasting”, p.232, e-artnow