Mattock,John. How to be a better negotiator.
Chicago-čujuhus (17. p.)Mattock,John. How to Be a Better Negotiator.
MLA-čujuhus (9. p.)Mattock,John. How to Be a Better Negotiator.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.