Dyfyniad APA

Van Dalen, D. B. (1973). Understanding educational research. McGraw-Hill.

Dyfyniad Arddull Chicago

Van Dalen, Deobold B. Understanding Educational Research. New York: McGraw-Hill, 1973.

Dyfyniad MLA

Van Dalen, Deobold B. Understanding Educational Research. McGraw-Hill, 1973.

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