Zak, A. Europe to Join Russia in Building The Next Space Shuttle. IEEE spectrum.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रZak, A. "Europe to Join Russia in Building The Next Space Shuttle." IEEE Spectrum .
एमएलए (9वां संस्करण) प्रशस्ति पत्रZak, A. "Europe to Join Russia in Building The Next Space Shuttle." IEEE Spectrum, .
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