Adams, Robert M. (1987): «Moral Arguments for Theistic Belief» i: . New York: Oxford University Press. Hare, John (1996): . Oxford: Oxford University Press. Kant, Immanuel. , esp. Part I, Bk. II, Chap. V. Mange utgaver. Mackie, J. L.( 1982): , kapittel 6. Oxford: Oxford University Press. Swinburne, Richard (1979): , kapittel 9. Oxford: Oxford University Press.