Grey, P. (2016). A history of travel in 50 vehicles (First edition.). Tilbury House Publishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGrey, Paula. A History of Travel in 50 Vehicles. First edition. Thomaston, Maine: Tilbury House Publishers, 2016.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGrey, Paula. A History of Travel in 50 Vehicles. First edition. Tilbury House Publishers, 2016.
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