Heartney, E. (1997). Alan Sonfist: History and the Landscape / Text by Eleanor Heartney ; Organized by Stephen Prokopoff.
Chicago-referens (17:e uppl.)Heartney, Eleanor. Alan Sonfist: History and the Landscape / Text by Eleanor Heartney ; Organized by Stephen Prokopoff. Iowa City, 1997.
MLA-referens (8:e uppl.)Heartney, Eleanor. Alan Sonfist: History and the Landscape / Text by Eleanor Heartney ; Organized by Stephen Prokopoff. 1997.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.