Dyfyniad APA

Report on In-Class Variables: Fall 1987 & Fall 1992. US Department of Education.

Dyfyniad Arddull Chicago

Report on In-Class Variables: Fall 1987 & Fall 1992. US Department of Education.

Dyfyniad MLA

Report on In-Class Variables: Fall 1987 & Fall 1992. US Department of Education.

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