* [https://archive.org/details/lecturesonmoralp00withrich Lectures on Moral Philosophy]
* [https://archive.org/details/lecturesonmoralp00withrich Lectures on Moral Philosophy]
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* [https://oll.libertyfund.org/pages/1776-witherspoon-dominion-of-providence-over-the-passions-of-men-sermon The dominion of Providence over the passions of men]