Dyfyniad APA

(1971). Illustrated world of science encyclopaedia. Creative world publications.

Dyfyniad Arddull Chicago

Illustrated World of Science Encyclopaedia. Chicago: Creative world publications, 1971.

Dyfyniad MLA

Illustrated World of Science Encyclopaedia. Creative world publications, 1971.

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