Fisher, R. (1991). Getting to Yes (2nd.). Pearson education.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFisher, Roger. Getting to Yes. 2nd. New Delhi: Pearson education, 1991.
एमएलए (9वां संस्करण) प्रशस्ति पत्रFisher, Roger. Getting to Yes. 2nd. Pearson education, 1991.
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