Não informado. (2003). Education of the Visually Handicapped. Association for Education of the Visually Handicapped.
Citação do estilo Chicago (17ª ed.)Não informado. Education of the Visually Handicapped. Philadelphia, Pa: Association for Education of the Visually Handicapped, 2003.
Citação MLA (8ª ed.)Não informado. Education of the Visually Handicapped. Association for Education of the Visually Handicapped, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.