Alfred Adler (2002). “The Collected Clinical Works of Alfred Adler, Volume 1: Fundamentals of Individual Psychology and Psychotherapy: the Neurotic Character”, p.48, Alfred Adler Institute
Sir Thomas Browne (1736). “Sir Thomas Browne's Religio Medici: Or, the Christian Religion, as Professed by a Physician; Freed from Priest-craft and the Jargon of Schools”, p.95