Lookwood, A. &. R. (2010). Hospitality and tourism operating systems. Cengage Publishing.
Chicago-čujuhus (17. p.)Lookwood, Andrew & Rouski. Hospitality and Tourism Operating Systems. Canada: Cengage Publishing, 2010.
MLA-čujuhus (9. p.)Lookwood, Andrew & Rouski. Hospitality and Tourism Operating Systems. Cengage Publishing, 2010.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.