Williams, G. (1977). Towards lifelong education. Unesco.
Chicago-čujuhus (17. p.)Williams, Gareth. Towards Lifelong Education. Unesco, 1977.
MLA-čujuhus (9. p.)Williams, Gareth. Towards Lifelong Education. Unesco, 1977.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.