John Milton (2013). “Paradise Lost Simplified!: Includes Modern Translation, Study Guide, Historical Context, Biography, and Character Index”, p.109, BookCaps Study Guides
John Milton (1824). “The Poetical Works of John Milton: With Notes of Various Authors, Principally from the Edition of Thomas Newton, Charles Dunster, and Thomas Warton, to which is Prefixed, Newton's Life of Milton”, p.413