Dyfyniad APA

Ferguson, C. E., & Vaish, M. C. (1962). Principles of economics. Duke University.

Dyfyniad Arddull Chicago

Ferguson, C. E., and M. C. Vaish. Principles of Economics. USA: Duke University, 1962.

Dyfyniad MLA

Ferguson, C. E., and M. C. Vaish. Principles of Economics. Duke University, 1962.

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