Rishel, J. F. (1990). Founding families of Pittsburgh: The evolution of a regional elite, 1760-1910. University of Pittsburgh Press.
Chicago-referens (17:e uppl.)Rishel, Joseph Francis. Founding Families of Pittsburgh: The Evolution of a Regional Elite, 1760-1910. Pittsburgh: University of Pittsburgh Press, 1990.
MLA-referens (9:e uppl.)Rishel, Joseph Francis. Founding Families of Pittsburgh: The Evolution of a Regional Elite, 1760-1910. University of Pittsburgh Press, 1990.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.