Dyfyniad APA

(1979). Methods For Analysis and Testing (38th ed.). Hyden.

Dyfyniad Arddull Chicago

Methods For Analysis and Testing. 38th ed. London: Hyden, 1979.

Dyfyniad MLA

Methods For Analysis and Testing. 38th ed. Hyden, 1979.

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