Dyfyniad APA

(1988). Principles of political economy. Scott, Foresmam and company.

Dyfyniad Arddull Chicago

Principles of Political Economy. Scott, Foresmam and company, 1988.

Dyfyniad MLA

Principles of Political Economy. Scott, Foresmam and company, 1988.

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