Sir William BLACKSTONE, Samuel Warren (1856). “Blackstone's Commentaries systematically abridged and adapted to the existing state of the law and constitution, with great additions. By Samuel Warren”, p.101
William Blackstone (2016). “The Oxford Edition of Blackstone's: Commentaries on the Laws of England: Book I: Of the Rights of Persons”, p.206, Oxford University Press
William Blackstone (2016). “The Oxford Edition of Blackstone's: Commentaries on the Laws of England: Book II: Of the Rights of Things”, p.57, Oxford University Press