Foster, D. L. (1998). The business of travelagency operations and administration. Glencoe/McGraw-Hill.
Citace podle Chicago (17th ed.)Foster, Dennis L. The Business of Travelagency Operations and Administration. Glencoe/McGraw-Hill, 1998.
Citace podle MLA (8th ed.)Foster, Dennis L. The Business of Travelagency Operations and Administration. Glencoe/McGraw-Hill, 1998.
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