Rheingold, H. (1991). Virtual reality. Summit Books.
Lua i Stíl Chicago (17ú heag.)Rheingold, Howard. Virtual Reality. New York: Summit Books, 1991.
Lua MLA (9ú heag.)Rheingold, Howard. Virtual Reality. Summit Books, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.