Donner, Irah (July 1992). "The Copyright Clause of the U. S. Constitution: Why Did the Framers Include It with Unanimous Approval?". The American Journal of Legal History. 36 (3): 361–378. doi:10.2307/845426. JSTOR845426.
Donner, Irah (July 1992). "The Copyright Clause of the U. S. Constitution: Why Did the Framers Include It with Unanimous Approval?". The American Journal of Legal History. 36 (3): 361–378. doi:10.2307/845426. JSTOR845426.
Washington, George (January 8, 1790). "State of the Union Address 1790". George Washington Mount Vernon. 2016 Mount Vernon Ladies' Association. Retrieved 2018-07-25.