Sherfield Robert M. Cornerstone Developing Soft Skills (4th.). Pearson.
Chicago-čujuhus (17. p.)Sherfield Robert M. Cornerstone Developing Soft Skills. 4th. Delhi Delhi: Pearson.
MLA-čujuhus (9. p.)Sherfield Robert M. Cornerstone Developing Soft Skills. 4th. Pearson.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.