Dyfyniad APA

Beins, B. C. (2019). Research Methods (4th.). Cambridge University Press.

Dyfyniad Arddull Chicago

Beins, Bernard C. Research Methods. 4th. Cambridge University Press, 2019.

Dyfyniad MLA

Beins, Bernard C. Research Methods. 4th. Cambridge University Press, 2019.

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