(1992). An outline of America economy. New York, USA: United States Information Agency.
Chicago Style aipamenaAn Outline of America Economy. New York, USA: United States Information Agency, 1992.
MLA aipamenaAn Outline of America Economy. New York, USA: United States Information Agency, 1992.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.