Gostick, A. (2007). The carrot principle. Free Press.
Chicago-čujuhus (17. p.)Gostick, Adrian. The Carrot Principle. New York: Free Press, 2007.
MLA-čujuhus (9. p.)Gostick, Adrian. The Carrot Principle. Free Press, 2007.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.