Problems and methods in programmed learning: The Proceedings of the 1967 APL/NCPL Birmingham Conference Part 4.
Lua i Stíl Chicago (17ú heag.)Problems and Methods in Programmed Learning: The Proceedings of the 1967 APL/NCPL Birmingham Conference Part 4.
Lua MLA (9ú heag.)Problems and Methods in Programmed Learning: The Proceedings of the 1967 APL/NCPL Birmingham Conference Part 4.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.