Dyfyniad APA

Edward, G., & Zeller, R. A. (1979). Reliability and validity assessment. Sage.

Dyfyniad Arddull Chicago

Edward, G.Carmines, and Richard A. Zeller. Reliability and Validity Assessment. Newbary park: Sage, 1979.

Dyfyniad MLA

Edward, G.Carmines, and Richard A. Zeller. Reliability and Validity Assessment. Sage, 1979.

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