WALKER, J. R. (2017). Introduction to hospitality. Pearson Education.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWALKER, John R. Introduction to Hospitality. Pearson Education, 2017.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWALKER, John R. Introduction to Hospitality. Pearson Education, 2017.
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