Dyfyniad APA

Samuelson, P. A., Nordhaus, W. D., & Mandel, M. J. (1995). Economics (15th ed.). McGraw-Hill.

Dyfyniad Arddull Chicago

Samuelson, Paul Anthony, William D. Nordhaus, and Michael J. Mandel. Economics. 15th ed. New York: McGraw-Hill, 1995.

Dyfyniad MLA

Samuelson, Paul Anthony, et al. Economics. 15th ed. McGraw-Hill, 1995.

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