Kay, Steven M. (June 1987). "McMahon, John, House". National Register of Historic Places Registration Form. National Park Service. Archived(PDF) from the original on December 24, 2013. Retrieved December 24, 2013. See also:"Accompanying photos". Archived(PDF) from the original on December 24, 2013. Retrieved December 24, 2013.
Kay, Steven M. (June 1987). "McMahon, John, House". National Register of Historic Places Registration Form. National Park Service. Archived(PDF) from the original on December 24, 2013. Retrieved December 24, 2013. See also:"Accompanying photos". Archived(PDF) from the original on December 24, 2013. Retrieved December 24, 2013.