Não informado. (1991). Training and Development. American Society for Training and Development.
Citação do estilo Chicago (17ª ed.)Não informado. Training and Development. Alexandria, Va: American Society for Training and Development, 1991.
Citação MLA (8ª ed.)Não informado. Training and Development. American Society for Training and Development, 1991.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.