Feynman, R. P., & Poe, R. (2005). Perfectly reasonable deviations from the beaten track: The letters of richard p. feynman (Unabridged.). Recorded Books Inc..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFeynman, Richard P., और Richard Poe. Perfectly Reasonable Deviations from the Beaten Track: The Letters of Richard P. Feynman. Unabridged. Prince Frederick: Recorded Books Inc., 2005.
एमएलए (8वां संस्करण) प्रशस्ति पत्रFeynman, Richard P., और Richard Poe. Perfectly Reasonable Deviations from the Beaten Track: The Letters of Richard P. Feynman. Unabridged. Recorded Books Inc., 2005.
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