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2. Godwin, W. (1798 [1976]). Enquiry Concerning Political Justice (abbreviated as PJ). Penguin Books.
3. Godwin, W. (1820 [1964]). Of Population: An Enquiry Concerning the Power of Increase in the Numbers of Mankind, Being An Answer to Mr. Malthus’s Essay on That Subject (abbreviated as OP). Augustus M. Kelley.
4. Malthus, T. R. (1798 [1970]). Essay on the Principle of Population, as it affects the Future Improvement of Society, with Remarks on the Speculations of Mr. Godwin, M. Condorcet, and Other Writers (abbreviated as FE). Penguin.
5. Malthus, T. R. (1800 [1986]). An Investigation of the Cause of the present High Price of Provisions (abbreviated as HPP), reprinted in The Works of Thomas Robert Malthus (Vol. 7, pp. 5–18). Pickering and Chatto.