Thomas Hobbes (1750). “The Moral and Political Works To which is Prefixed the Autors Life, Extracted from that Said to be Written by Himself ... Illustr. by the Ed. - London 1750”, p.580
Thomas Hobbes (2015). “Annotated LEVIATHAN with English Grammar Exercises: by Thomas Hobbes (Author), Robert Powell (Editor)”, p.12, Powell Publications, LLC