Dyfyniad APA

United States. Department of Education. (1986). What works: Research about teaching and learning. U.S. Dept. of Education.

Dyfyniad Arddull Chicago

United States. Department of Education. What Works: Research About Teaching and Learning. Washington, D.C.: U.S. Dept. of Education, 1986.

Dyfyniad MLA

United States. Department of Education. What Works: Research About Teaching and Learning. U.S. Dept. of Education, 1986.

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