Dyfyniad APA

Paul A Samuelson & William D Nordhaus. (2010). Macroeconomics (19th ed.). Mc-GrawHill Education.

Dyfyniad Arddull Chicago

Paul A Samuelson and William D Nordhaus. Macroeconomics. 19th ed. NewDelhi: Mc-GrawHill Education, 2010.

Dyfyniad MLA

Paul A Samuelson and William D Nordhaus. Macroeconomics. 19th ed. Mc-GrawHill Education, 2010.

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