Dyfyniad APA

Sichel, W., & Eckstein, P. (1977). Basic economic concepts. Rand McNally College Pub. Co..

Dyfyniad Arddull Chicago

Sichel, Werner, and Peter Eckstein. Basic Economic Concepts. Chicago: Rand McNally College Pub. Co., 1977.

Dyfyniad MLA

Sichel, Werner, and Peter Eckstein. Basic Economic Concepts. Rand McNally College Pub. Co., 1977.

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