Flaschka, M. (1998). The intelligent travel company: Enhancing organizational intelligence through management systems. Verlag Paul Haupt.
Chicago-referens (17:e uppl.)Flaschka, Michael. The Intelligent Travel Company: Enhancing Organizational Intelligence Through Management Systems. Bern: Verlag Paul Haupt, 1998.
MLA-referens (8:e uppl.)Flaschka, Michael. The Intelligent Travel Company: Enhancing Organizational Intelligence Through Management Systems. Verlag Paul Haupt, 1998.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.