Não informado. (1966). Programmed learning and educational technology. Association for Programmed Learning.
Lua i Stíl Chicago (17ú heag.)Não informado. Programmed Learning and Educational Technology. London: Association for Programmed Learning, 1966.
Lua MLA (8ú heag.)Não informado. Programmed Learning and Educational Technology. Association for Programmed Learning, 1966.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.