Oliver Goldsmith (1856). “The Miscellaneous Works: Letters from a citizen of the world, to his friend in the East. A familiar introduction to the study of natural history”, p.323
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