Não informado. (1991). Training and Development. American Society for Training and Development.
Lua i Stíl Chicago (17ú heag.)Não informado. Training and Development. Alexandria, Va: American Society for Training and Development, 1991.
Lua MLA (8ú heag.)Não informado. Training and Development. American Society for Training and Development, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.