Josiah Warren (1849). “Equitable Commerce: A New Development of Principles for the Harmoneous Adjustment and Regulation of the Pecuniary,intellectual,and Moral Intercourse of Mankind,proposed as Elements of New Society”, p.5
Frances Ellen Watkins Harper, Frances Smith Foster (1990). “A Brighter Coming Day: A Frances Ellen Watkins Harper Reader”, p.220, Feminist Press at CUNY