Goldratt Eliyahu M. (2010). Isn't It Obvious. Productivity & Quality.
Chicago-čujuhus (17. p.)Goldratt Eliyahu M. Isn't It Obvious. Madras: Productivity & Quality, 2010.
MLA-čujuhus (9. p.)Goldratt Eliyahu M. Isn't It Obvious. Productivity & Quality, 2010.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.