Mauboussin, M. j. (2009). Think Twice. HBS.
Chicago-čujuhus (17. p.)Mauboussin, Michael j. Think Twice. HBS, 2009.
MLA-čujuhus (9. p.)Mauboussin, Michael j. Think Twice. HBS, 2009.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.