Goldratt Eliyahu M. (2010). Isn't It Obvious. Productivity & Quality.
Čikaški stil citiranja (17. izdanje)Goldratt Eliyahu M. Isn't It Obvious. Madras: Productivity & Quality, 2010.
MLA način citiranja (9. izdanje)Goldratt Eliyahu M. Isn't It Obvious. Productivity & Quality, 2010.
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