London, M. (2021). The energy of tomorrow. Essential Library.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLondon, Martha. The Energy of Tomorrow. Minneapolis, Minnesota: Essential Library, 2021.
एमएलए (8वां संस्करण) प्रशस्ति पत्रLondon, Martha. The Energy of Tomorrow. Essential Library, 2021.
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