(1987). Developing auto-instructional materials / A.J. Romiszowski.
Chicago-čujuhus (17. p.)Developing Auto-instructional Materials / A.J. Romiszowski. 1987.
MLA-čujuhus (9. p.)Developing Auto-instructional Materials / A.J. Romiszowski. 1987.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.