Hudson, S. (2020). COVID-19 and travel: Impacts, responses and outcomes. Goodfellow Publishers Limited.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHudson, Simon. COVID-19 and Travel: Impacts, Responses and Outcomes. Oxford: Goodfellow Publishers Limited, 2020.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHudson, Simon. COVID-19 and Travel: Impacts, Responses and Outcomes. Goodfellow Publishers Limited, 2020.
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