Dyfyniad APA

Dewey, M. (1979). Dewey decimal classification and relative index, Vol.2 Schedules (19 ed.). Forest Press.

Dyfyniad Arddull Chicago

Dewey, Melvil. Dewey Decimal Classification and Relative Index, Vol.2 Schedules. 19 ed. NewYork: Forest Press, 1979.

Dyfyniad MLA

Dewey, Melvil. Dewey Decimal Classification and Relative Index, Vol.2 Schedules. 19 ed. Forest Press, 1979.

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