Lookwood, A. &. R. (2010). Hospitality and tourism operating systems. Cengage Publishing.
Chicago-referens (17:e uppl.)Lookwood, Andrew & Rouski. Hospitality and Tourism Operating Systems. Canada: Cengage Publishing, 2010.
MLA-referens (9:e uppl.)Lookwood, Andrew & Rouski. Hospitality and Tourism Operating Systems. Cengage Publishing, 2010.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.