Dyfyniad APA

Yarrow. Measuring America. University of Massachusetts Press.

Dyfyniad Arddull Chicago

Yarrow. Measuring America. University of Massachusetts Press.

Dyfyniad MLA

Yarrow. Measuring America. University of Massachusetts Press.

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