Henry Wadsworth Longfellow (1888). “Longfellow's Days: The Longfellow Prose Birthday Book : Extracts from the Journals and Letters of H. W. Longfellow”
Denis Waitley, Dayna Waitley, Deborah Waitley (1999). “The Psychology of Winning for Women: What Every Woman Needs to Know, what Every Man Needs to Understand”, Executive Excellence Pub