APA aipamena

(1992). An outline of America geography: Regional landscapes of the United States. New York, USA: United States Information Agency.

Chicago Style aipamena

An Outline of America Geography: Regional Landscapes of the United States. New York, USA: United States Information Agency, 1992.

MLA aipamena

An Outline of America Geography: Regional Landscapes of the United States. New York, USA: United States Information Agency, 1992.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.