John Locke (1824). “The Works of John Locke: Essay concerning human understanding (concluded) Defence of Mr. Locke's opinion concerning personal identity. Of the conduct of the understanding. Some thoughts concerning reading and study for a gentlemen. Elements of natural philosophy. New method of a common-place-book”, p.356
"Best You Ever: 365 Ways to be Richer, Happier, Thinner, Smarter, Younger, Sexier, and More Relaxed - Each and Every Day". Book by Rebecca Swanner (p. 324), October 18, 2010.