(1975). Handbook for preparation of work breakdown structures / National Aeronautics and Space Administration.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHandbook for Preparation of Work Breakdown Structures / National Aeronautics and Space Administration. 1975.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHandbook for Preparation of Work Breakdown Structures / National Aeronautics and Space Administration. 1975.
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