Ewing, R. A. (2012). Power with nature: Renewable energy options for homeowners (Updated 3rd edition.). PixyJack Press, Inc..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रEwing, Rex A. Power with Nature: Renewable Energy Options for Homeowners. Updated 3rd edition. Masonville, CO: PixyJack Press, Inc., 2012.
एमएलए (8वां संस्करण) प्रशस्ति पत्रEwing, Rex A. Power with Nature: Renewable Energy Options for Homeowners. Updated 3rd edition. PixyJack Press, Inc., 2012.
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