Dyfyniad APA

Dewey Melvil. (1971). Decimal Classification and Relative Index vol 3 Relative Index (18th.). Forest press Inc.

Dyfyniad Arddull Chicago

Dewey Melvil. Decimal Classification and Relative Index Vol 3 Relative Index. 18th. New York: Forest press Inc, 1971.

Dyfyniad MLA

Dewey Melvil. Decimal Classification and Relative Index Vol 3 Relative Index. 18th. Forest press Inc, 1971.

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