Dyfyniad APA

Samuelson, P. A., Nordhaus, W. D., Chaudhuri, S., & Sen, A. (2020). Economics (20th ed.). McGraw Hill Education (India) Pvt. Ltd.

Dyfyniad Arddull Chicago

Samuelson, Paul A., William D. Nordhaus, Sudip Chaudhuri, and Anindya Sen. Economics. 20th ed. New Delhi: McGraw Hill Education (India) Pvt. Ltd, 2020.

Dyfyniad MLA

Samuelson, Paul A., et al. Economics. 20th ed. McGraw Hill Education (India) Pvt. Ltd, 2020.

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