APA aipamena

Samuelson, P. A. (2022). Economics (20th.). McGraw Hill Education.

Chicago Style aipamena

Samuelson, Paul A. Economics. 20th. Chennai: McGraw Hill Education, 2022.

MLA aipamena

Samuelson, Paul A. Economics. 20th. McGraw Hill Education, 2022.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.