Wallis, J. (1691). A fourth letter concerning the sacred Trinity: In reply to what is entituled An answer to Dr. Wallis's three letters. Printed for Tho. Parkhurst.
Chicago Style (17th ed.) CitationWallis, John. A Fourth Letter Concerning the Sacred Trinity: In Reply to What Is Entituled An Answer to Dr. Wallis's Three Letters. London: Printed for Tho. Parkhurst, 1691.
MLA (9th ed.) CitationWallis, John. A Fourth Letter Concerning the Sacred Trinity: In Reply to What Is Entituled An Answer to Dr. Wallis's Three Letters. Printed for Tho. Parkhurst, 1691.
Warning: These citations may not always be 100% accurate.