George R. R. Martin (2011). “A Game of Thrones 4-Book Bundle: A Song of Ice and Fire Series: A Game of Thrones, A Clash of Kings, A Storm of Swords, and A Feast for Crows”, p.965, Bantam
Gene Stratton-Porter (2016). “Gene Stratton-Porter Collection: A Girl of the Limberlost, Freckles, Laddie, The Harvester, A Daughter of the Land, At the Foot of the Rainbow, Her Fatther's Daughter, Michale O'Halloran”, p.84, Xist Publishing
Cassandra Clare (2010). “Cassandra Clare: The Mortal Instrument Series (3 books): City of Bones; City of Ashes; City of Glass”, p.987, Simon and Schuster
Quoted in Christian Monitor, and Religious Intelligencer, 4 July 1812. An almost identical quotation by Newton, said to have been uttered "a little before he died," appears in Joseph Spence, Anecdotes, Observations, and Characters of Books and Men, published in 1820 but extant in manuscript form from around 1730. A paraphrase of Newton's words was printed in a note in a 1797 edition of TheWorks of Alexander Pope.