Dyfyniad APA
Cohen, L., & Manion, L. (1985). Research methods in education. Croom Helm.
Dyfyniad Arddull Chicago
Cohen, Louis, and Lawrence Manion. Research Methods in Education. London: Croom Helm, 1985.
Dyfyniad MLA
Cohen, Louis, and Lawrence Manion. Research Methods in Education. Croom Helm, 1985.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.