Heard, A. (1999). Apocalypse pretty soon: Travels in end-time America. W.W. Norton.
Chicago Style aipamenaHeard, Alex. Apocalypse Pretty Soon: Travels in End-time America. New York: W.W. Norton, 1999.
MLA aipamenaHeard, Alex. Apocalypse Pretty Soon: Travels in End-time America. W.W. Norton, 1999.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.