Foster, D. L. (1998). The business of travelagency operations and administration. Glencoe/McGraw-Hill.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFoster, Dennis L. The Business of Travelagency Operations and Administration. Glencoe/McGraw-Hill, 1998.
एमएलए (8वां संस्करण) प्रशस्ति पत्रFoster, Dennis L. The Business of Travelagency Operations and Administration. Glencoe/McGraw-Hill, 1998.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.