Dyfyniad APA

Bernard, R. (2013). Social research methods (2nd.). Sage Publication.

Dyfyniad Arddull Chicago

Bernard, Russell. Social Research Methods. 2nd. London: Sage Publication, 2013.

Dyfyniad MLA

Bernard, Russell. Social Research Methods. 2nd. Sage Publication, 2013.

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