(1979). Facing the future: Mastering the probable and managing the unpredictable. Paris: Organisation for Economic Co-Operation and Development.
Chicago Style aipamenaFacing the Future: Mastering the Probable and Managing the Unpredictable. Paris: Organisation for Economic Co-Operation and Development, 1979.
MLA aipamenaFacing the Future: Mastering the Probable and Managing the Unpredictable. Paris: Organisation for Economic Co-Operation and Development, 1979.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.