"Founders Online: Robert Hunter Morris to Thomas Penn, 28 November 1755". founders.archives.gov (به انگلیسی). [Original source: The Papers of Benjamin Franklin, vol. 6, April 1, 1755, through September 30, 1756, ed. Leonard W. Labaree. New Haven and London: Yale University Press, 1963, pp. 279–284.] Retrieved 19 March 2020.
"Robert Morris". www.history.njd.uscourts.gov. Historical Society of the US District Court for the District of NJ | United States District Court. Retrieved 19 March 2020.