Council for Exceptional Children. Division of Learning Disabilities. (1991). Learning disabilities research & practice: A publication of the Division for Learning Disabilities, Council for Exceptional Children. Springer International.
Dyfyniad Arddull ChicagoCouncil for Exceptional Children. Division of Learning Disabilities. Learning Disabilities Research & Practice: A Publication of the Division for Learning Disabilities, Council for Exceptional Children. New York, NY: Springer International, 1991.
Dyfyniad MLACouncil for Exceptional Children. Division of Learning Disabilities. Learning Disabilities Research & Practice: A Publication of the Division for Learning Disabilities, Council for Exceptional Children. Springer International, 1991.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.