Slack, . N. Operations Strategy 5ed. Pearson.
Chicago-čujuhus (17. p.)Slack, Nigel. Operations Strategy 5ed. Pearson.
MLA-čujuhus (9. p.)Slack, Nigel. Operations Strategy 5ed. Pearson.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.