Dyfyniad APA

Heffernan,Shelagh, & Sinclair,Peter. (1990). Modern internaitonal economics. Blackwell.

Dyfyniad Arddull Chicago

Heffernan,Shelagh, and Sinclair,Peter. Modern Internaitonal Economics. U K: Blackwell, 1990.

Dyfyniad MLA

Heffernan,Shelagh, and Sinclair,Peter. Modern Internaitonal Economics. Blackwell, 1990.

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