David Hume, Eric Steinberg (1993). “An Enquiry Concerning Human Understanding ; [with] A Letter from a Gentleman to His Friend in Edinburgh ; [and] An Abstract of a Treatise of Human Nature”, p.51, Hackett Publishing
David Hume (1824). “The Philosophical Works of David Hume ... Containing Dialogues Concerning Natural Religion, Essays on the Immortality of the Soul, Suicide ... &c. A New Edition”, p.116
David Hume, Tom L. Beauchamp (2007). “A Dissertation on the Passions: The Natural History of Religion : a Critical Edition”, p.24, Oxford University Press