Feynman, R. P. (2011). Six not-so-easy pieces: Einstein's relativity, symmetry, and space-time. Basic Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFeynman, Richard P. Six Not-so-easy Pieces: Einstein's Relativity, Symmetry, and Space-time. New York: Basic Books, 2011.
एमएलए (9वां संस्करण) प्रशस्ति पत्रFeynman, Richard P. Six Not-so-easy Pieces: Einstein's Relativity, Symmetry, and Space-time. Basic Books, 2011.
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