Foster, D. L. (1998). The business of travelagency operations and administration. Glencoe/McGraw-Hill.
Chicago-referens (17:e uppl.)Foster, Dennis L. The Business of Travelagency Operations and Administration. Glencoe/McGraw-Hill, 1998.
MLA-referens (8:e uppl.)Foster, Dennis L. The Business of Travelagency Operations and Administration. Glencoe/McGraw-Hill, 1998.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.