APA (7e ed.) Bronvermelding

Foster, D. L. (1998). The business of travelagency operations and administration. Glencoe/McGraw-Hill.

Chicago (17e ed.) Bronvermelding

Foster, Dennis L. The Business of Travelagency Operations and Administration. Glencoe/McGraw-Hill, 1998.

MLA (8e ed.) Bronvermelding

Foster, Dennis L. The Business of Travelagency Operations and Administration. Glencoe/McGraw-Hill, 1998.