APA aipamena

Gwartney, J. D. (1980). Economics (Second Edition). ELSEVIER.

Chicago Style aipamena

Gwartney, James D. Economics (Second Edition). ELSEVIER, 1980.

MLA aipamena

Gwartney, James D. Economics (Second Edition). ELSEVIER, 1980.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.