Johnston Robert. (2008). Service Operations Management (2nd.). Pearson.
Chicago-čujuhus (17. p.)Johnston Robert. Service Operations Management. 2nd. Noida: Pearson, 2008.
MLA-čujuhus (9. p.)Johnston Robert. Service Operations Management. 2nd. Pearson, 2008.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.