Dyfyniad APA

Barrall, I. (2015). The art of fear. Boston: National Geographic Learning.

Dyfyniad Arddull Chicago

Barrall, Irene. The Art of Fear. Boston: National Geographic Learning, 2015.

Dyfyniad MLA

Barrall, Irene. The Art of Fear. Boston: National Geographic Learning, 2015.

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