Dyfyniad APA

Dewey, M. (1951). Decimal classification & relative index (Standard (15th) ed. rev.). Forest Press.

Dyfyniad Arddull Chicago

Dewey, Melvil. Decimal Classification & Relative Index. Standard (15th) ed. rev. Lake Placid Club, N.Y.: Forest Press, 1951.

Dyfyniad MLA

Dewey, Melvil. Decimal Classification & Relative Index. Standard (15th) ed. rev. Forest Press, 1951.

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