Cohen, L. (2000). Research methods in education. London: RoutledgeFalmer.
Dyfyniad Arddull ChicagoCohen, Louis. Research Methods in Education. London: RoutledgeFalmer, 2000.
Dyfyniad MLACohen, Louis. Research Methods in Education. London: RoutledgeFalmer, 2000.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.