Sally, D. (2020). One step ahead: Mastering the art and science of negotiation (First U.S. edition.). St. Martin's Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSally, David. One Step Ahead: Mastering the Art and Science of Negotiation. First U.S. edition. New York: St. Martin's Press, 2020.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSally, David. One Step Ahead: Mastering the Art and Science of Negotiation. First U.S. edition. St. Martin's Press, 2020.
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