Sylvia Boorstein, Ph.D. (2007). “Pay Attention, for Goodness' Sake: Practicing the Perfections of the Heart--The Buddhist Path of Kindness”, p.20, Ballantine Books
John Lyly, Leah Scragg (2003). “John Lyly 'Euphues: the Anatomy of Wit' and 'Euphues and His England': An Annotated, Modern-Spelling Edition”, p.49, Manchester University Press