APA aipamena

Samuelson, P. A. (1980). Economics. London: McGraw-Hill.

Chicago Style aipamena

Samuelson, Paul A. Economics. London: McGraw-Hill, 1980.

MLA aipamena

Samuelson, Paul A. Economics. London: McGraw-Hill, 1980.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.