Blackwell, A. (2006). Open forum 2: Academic listening and speaking. Univ. Pr.
Chicago-čujuhus (17. p.)Blackwell, Angela. Open Forum 2: Academic Listening and Speaking. Oxford: Univ. Pr, 2006.
MLA-čujuhus (9. p.)Blackwell, Angela. Open Forum 2: Academic Listening and Speaking. Univ. Pr, 2006.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.