REIN, D. P. (1985). Grolier advanced english course 4. Grolier International.
Chicago-čujuhus (17. p.)REIN, David P. Grolier Advanced English Course 4. (sl): Grolier International, 1985.
MLA-čujuhus (9. p.)REIN, David P. Grolier Advanced English Course 4. Grolier International, 1985.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.