RIGGS, J. L. (1969). Guide To Cost Reduction Thrugh Critical Path Scheduling James L. Riggs And Charles O. Heath. Prentice-Hall Inc.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRIGGS, James L. Guide To Cost Reduction Thrugh Critical Path Scheduling James L. Riggs And Charles O. Heath. Prentice-Hall Inc, 1969.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRIGGS, James L. Guide To Cost Reduction Thrugh Critical Path Scheduling James L. Riggs And Charles O. Heath. Prentice-Hall Inc, 1969.
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