Institute of Electrical and Electronics Engineers. (1993). Information technology-portable operating system interface (POSIX): Shell and utilities. IEEE.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रInstitute of Electrical and Electronics Engineers. Information Technology-portable Operating System Interface (POSIX): Shell and Utilities. New York, N.Y: IEEE, 1993.
एमएलए (9वां संस्करण) प्रशस्ति पत्रInstitute of Electrical and Electronics Engineers. Information Technology-portable Operating System Interface (POSIX): Shell and Utilities. IEEE, 1993.
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