David A. Durfee, William Henry Harrison, John Tyler, United States. President (1841-1845 : Tyler) (1970). “William Henry Harrison, 1773-1841: John Tyler, 1790-1862; chronology, documents, bibliographical aids”, Oceana Pubns
Countee Cullen, Gerald Lyn Early (1991). “My soul's high song: the collected writings of Countee Cullen, voice of the Harlem Renaissance”, Doubleday Books
"A Dictionary of Thoughts: Being a Cyclopedia of Laconic Quotations from the Best Authors of the World, Both Ancient and Modern" by Tryon Edwards, New York, Cassell publishing company, (p. 212), 1891.