Sources for the Hume Time Line
- "Hume, David." Encyclopedia Britannica, 1957.
- "Hume, David." Encyclopedia of Philosophy, 1967.
- Hume, David. Dialogues Concerning Natural Religion. Ed. Richard
H. Popkin. Indianapolis: Hackett Publishing Co., 1980.
- Hume, David. An Essay Concerning Human UnderstandingEd. Eric
Steinberg, Indianapolis: Hackett Publishing Co., 1977.