(1999). Higher education through open and distance learning. Routledge.
Chicago-čujuhus (17. p.)Higher Education Through Open and Distance Learning. Routledge, 1999.
MLA-čujuhus (9. p.)Higher Education Through Open and Distance Learning. Routledge, 1999.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.