APA-viite (7. p.)
Gary, J., & Gary, O. (1989). The Countdown has begun: The story of the Global Consultation on AD 2000. AD 2000 Global Service Office.
Chicago-viite (17. p.)
Gary, Jay, ja Olgy Gary. The Countdown Has Begun: The Story of the Global Consultation on AD 2000. Rockville: AD 2000 Global Service Office, 1989.
MLA-viite (9. p.)
Gary, Jay, ja Olgy Gary. The Countdown Has Begun: The Story of the Global Consultation on AD 2000. AD 2000 Global Service Office, 1989.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.