Dyfyniad APA

(2000). Educational Environments & Types of Disabilities. U.S. Department of Education.

Dyfyniad Arddull Chicago

Educational Environments & Types of Disabilities. U.S. Department of Education, 2000.

Dyfyniad MLA

Educational Environments & Types of Disabilities. U.S. Department of Education, 2000.

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