Henry David Thoreau, Wesley T. Mott, Elizabeth Marshall Thomas (2005). “Bonds of Affection: Thoreau on Dogs and Cats”, p.65, Univ of Massachusetts Press
Henry David Thoreau (2014). “Citizen Thoreau: Walden, Civil Disobedience, Life Without Principle, Slavery in Massachusetts, A Plea for Captain John Brown”, p.141, Graphic Arts Books
Henry David Thoreau (2014). “Citizen Thoreau: Walden, Civil Disobedience, Life Without Principle, Slavery in Massachusetts, A Plea for Captain John Brown”, p.141, Graphic Arts Books