APA-referens (7:e uppl.)
Harpold, T. (2009). Ex-foliations: Reading machines and the upgrade path. University of Minnesota Press.
Chicago-referens (17:e uppl.)
Harpold, Terry. Ex-foliations: Reading Machines and the Upgrade Path. Minneapolis: University of Minnesota Press, 2009.
MLA-referens (9:e uppl.)
Harpold, Terry. Ex-foliations: Reading Machines and the Upgrade Path. University of Minnesota Press, 2009.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.