Davis, S. (1991). 2020 vision. New York: Fireside.
Chicago Style aipamenaDavis, Stan. 2020 Vision. New York: Fireside, 1991.
MLA aipamenaDavis, Stan. 2020 Vision. New York: Fireside, 1991.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
APA aipamena