Cass, S. Free as in freedom: Richard Stallman's crusade for free software [Book Review]. IEEE spectrum.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCass, S. "Free as in Freedom: Richard Stallman's Crusade for Free Software [Book Review]." IEEE Spectrum .
एमएलए (9वां संस्करण) प्रशस्ति पत्रCass, S. "Free as in Freedom: Richard Stallman's Crusade for Free Software [Book Review]." IEEE Spectrum, .
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.