Zook Chris. (2012). Repeatability. Harvard Business School Pub.
Chicago-čujuhus (17. p.)Zook Chris. Repeatability. Boston: Harvard Business School Pub, 2012.
MLA-čujuhus (9. p.)Zook Chris. Repeatability. Harvard Business School Pub, 2012.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.