Dyfyniad APA

(2000). Mathematics Performance of 4th-, 8th-, & 12th- Grade Students. U.S. Department of Education.

Dyfyniad Arddull Chicago

Mathematics Performance of 4th-, 8th-, & 12th- Grade Students. U.S. Department of Education, 2000.

Dyfyniad MLA

Mathematics Performance of 4th-, 8th-, & 12th- Grade Students. U.S. Department of Education, 2000.

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