Dyfyniad APA

(2011). Shale gas in Europe and America: Fracking here, fracking there.

Dyfyniad Arddull Chicago

Shale Gas in Europe and America: Fracking Here, Fracking There. 2011.

Dyfyniad MLA

Shale Gas in Europe and America: Fracking Here, Fracking There. 2011.

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