Dyfyniad APA

Hillmon. Getting a PhD in Economics. University of Pennsylvania Press.

Dyfyniad Arddull Chicago

Hillmon. Getting a PhD in Economics. University of Pennsylvania Press.

Dyfyniad MLA

Hillmon. Getting a PhD in Economics. University of Pennsylvania Press.

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