Dyfyniad APA

Samuelson, P. A. (1958). Economics: An introductory analysis (4th.ed.). McGraw-Hill.

Dyfyniad Arddull Chicago

Samuelson, Paul A. Economics: An Introductory Analysis. 4th.ed. New York: McGraw-Hill, 1958.

Dyfyniad MLA

Samuelson, Paul A. Economics: An Introductory Analysis. 4th.ed. McGraw-Hill, 1958.

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