APA aipamena

Samuelson, P. A. (1989). Economics. New York: McGraw-Hill.

Chicago Style aipamena

Samuelson, Paul Anthony. Economics. New York: McGraw-Hill, 1989.

MLA aipamena

Samuelson, Paul Anthony. Economics. New York: McGraw-Hill, 1989.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.