APA aipamena

Smith, H. R. (1955). Economic history of the united states.

Chicago Style aipamena

Smith, Howard R. Economic History of the United States. Ronald Press Company, New York, 1955.

MLA aipamena

Smith, Howard R. Economic History of the United States. 1955.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.