APA (7th ed.) Zitazioa
Gary, J., & Gary, O. (1989). The Countdown has begun: The story of the Global Consultation on AD 2000. AD 2000 Global Service Office.
Chicago Style (17th ed.) Zitazioa
Gary, Jay, eta Olgy Gary. The Countdown Has Begun: The Story of the Global Consultation on AD 2000. Rockville: AD 2000 Global Service Office, 1989.
MLA (9th ed.) Zitazioa
Gary, Jay, eta Olgy Gary. The Countdown Has Begun: The Story of the Global Consultation on AD 2000. AD 2000 Global Service Office, 1989.
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