Dyfyniad APA

(2000). The world book student discovery encyclopedia. Chicago: World book, inc.

Dyfyniad Arddull Chicago

The World Book Student Discovery Encyclopedia. Chicago: World book, inc, 2000.

Dyfyniad MLA

The World Book Student Discovery Encyclopedia. Chicago: World book, inc, 2000.

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