Dyfyniad APA

Samuelson, P. A., & Nordhaus, W. D. (2022). Economics (20th.). McGraw Hill Education.

Dyfyniad Arddull Chicago

Samuelson, Paul A., and William D. Nordhaus. Economics. 20th. New Delhi: McGraw Hill Education, 2022.

Dyfyniad MLA

Samuelson, Paul A., and William D. Nordhaus. Economics. 20th. McGraw Hill Education, 2022.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.