Dyfyniad APA

Percentile Distribution of Writing Performance Scores: 1984-96. US Department of Education.

Dyfyniad Arddull Chicago

Percentile Distribution of Writing Performance Scores: 1984-96. US Department of Education.

Dyfyniad MLA

Percentile Distribution of Writing Performance Scores: 1984-96. US Department of Education.

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