Gostick Adrian. (2009). Carrot Principle. Free Press.
Chicago-čujuhus (17. p.)Gostick Adrian. Carrot Principle. New York: Free Press, 2009.
MLA-čujuhus (9. p.)Gostick Adrian. Carrot Principle. Free Press, 2009.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.