Dyfyniad APA

Posen, M. (2003). Question and Answer Encyclopedia: The natural World. Parragon Publishing.

Dyfyniad Arddull Chicago

Posen, Michael. Question and Answer Encyclopedia: The Natural World. Bath Bai IHE, Inglaterra: Parragon Publishing, 2003.

Dyfyniad MLA

Posen, Michael. Question and Answer Encyclopedia: The Natural World. Parragon Publishing, 2003.

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