Dyfyniad APA

Time-Life Books. Nature. Time-Life Books.

Dyfyniad Arddull Chicago

Time-Life Books. Nature. New York: Time-Life Books.

Dyfyniad MLA

Time-Life Books. Nature. Time-Life Books.

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