Caldwell, John. The Family of William Findley of Westmoreland, Pa. Rock Island, Ill.: Five Rhinos Book Co., 2002.
------. William Findley from West of the Mountains: Congressman, 1791-1821. Gig Harbor, Wash.: Red Apple Pub., 2002.
Findley, William. The cause of the country truly stated. Speech of Mr. Findley, (of Pennsylvania) in the Congress of the U. States, the loan bill being under consideration. New York: Printed by E. Conrad, no. 4, Frankfort-street, 1814.
------. History of the Insurrection in the Four Western Counties of Pennsylvania. Philadelphia: Samuel Harrison Smith, 1796.
------. The report of William Findley and William Smith, on the waters of Connemaugh, Kishkemanettas, Dunning's Creek and the Bedford branch of Juniata. Harrisburg: N.p., 1815[-16].
------. A review of the revenue system adopted by the First Congress under the Federal Constitution : wherein the principles and tendency of the funding system and the measures connected with it to the end of the Second Congress are examined: In thirteen letters to a friend. By a Citizen. Philadelphia: Printed by T. Dobson, 1794.
Mast, James H. "William Findley's Attempt to Move the State Capital to Harrisburg in 1787." Western Pennsylvania Historical Magazine 39 (Fall 1956): 163-73.