Howard Kissel, Stella Adler (2000). “Stella Adler - The Art of Acting: preface by Marlon Brando compiled & edited by Howard Kissel”, p.65, Hal Leonard Corporation
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
Michel de Montaigne “Annotated Essays of Michel de Montaigne with English Grammar Exercises: by Michel de Montaigne (Author), Robert Powell (Editor)”, Powell Publications, LLC