Dyfyniad APA

McConnell, C. R. (1999). Economics: Principles, problems, and policies. New York: McGraw-Hill.

Dyfyniad Arddull Chicago

McConnell, Campbell R. Economics: Principles, Problems, and Policies. New York: McGraw-Hill, 1999.

Dyfyniad MLA

McConnell, Campbell R. Economics: Principles, Problems, and Policies. New York: McGraw-Hill, 1999.

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