WILLIAMSON DAVID. (2004). STRATEGIC MANAGEMENT AND BUSINESS ANALYSIS. BUTTERWORTH-HEINEMANN.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWILLIAMSON DAVID. STRATEGIC MANAGEMENT AND BUSINESS ANALYSIS. WOBURN,MA: BUTTERWORTH-HEINEMANN, 2004.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWILLIAMSON DAVID. STRATEGIC MANAGEMENT AND BUSINESS ANALYSIS. BUTTERWORTH-HEINEMANN, 2004.
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