Dyfyniad APA

(1993). Experimental design and methods. Sage.

Dyfyniad Arddull Chicago

Experimental Design and Methods. London: Sage, 1993.

Dyfyniad MLA

Experimental Design and Methods. Sage, 1993.

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