ALLEN, R. K. (1993). Dispute Avoidance And Resolution For Consulting Engineers Richard K. Allen. American Society of Civil Engi.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रALLEN, Richard K. Dispute Avoidance And Resolution For Consulting Engineers Richard K. Allen. American Society of Civil Engi, 1993.
एमएलए (8वां संस्करण) प्रशस्ति पत्रALLEN, Richard K. Dispute Avoidance And Resolution For Consulting Engineers Richard K. Allen. American Society of Civil Engi, 1993.
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