APA aipamena

Ellis,Howard S. (1949). A survey of contemporary economics. The Blakinston Company.

Chicago Style aipamena

Ellis,Howard S. A Survey of Contemporary Economics. Philadelphia: The Blakinston Company, 1949.

MLA aipamena

Ellis,Howard S. A Survey of Contemporary Economics. The Blakinston Company, 1949.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.