Dyfyniad APA

Feier, R. (1930). Elements of economics. College entrance book co..

Dyfyniad Arddull Chicago

Feier, Richard. Elements of Economics. New York: College entrance book co., 1930.

Dyfyniad MLA

Feier, Richard. Elements of Economics. College entrance book co., 1930.

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