Edson, L. (1976). How we learn. Time-Life International.
Lua i Stíl Chicago (17ú heag.)Edson, Lee. How We Learn. Nederland B.V: Time-Life International, 1976.
Lua MLA (9ú heag.)Edson, Lee. How We Learn. Time-Life International, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.