एपीए उद्धरण

(2002). Free software, free society: Selected essays of Richard M. Stallman. GNU Press.

शिकागो स्टाइल उद्धरण

Free Software, Free Society: Selected Essays of Richard M. Stallman. Boston: GNU Press, 2002.

एमएलए उद्धरण

Free Software, Free Society: Selected Essays of Richard M. Stallman. GNU Press, 2002.