Dyfyniad APA

Reader's Digest Association. (2013). Yellowstone. Chicago: Questar.

Dyfyniad Arddull Chicago

Reader's Digest Association. Yellowstone. Chicago: Questar, 2013.

Dyfyniad MLA

Reader's Digest Association. Yellowstone. Chicago: Questar, 2013.

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