Podell, J., Falik, J., & Axelrud, A. (1979). Developing sales effectiveness: Cases, exercises, and role-playing activities (First edition.). Random House Business Division.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPodell, Joel, Jonas Falik, और Abraham Axelrud. Developing Sales Effectiveness: Cases, Exercises, and Role-playing Activities. First edition. New York: Random House Business Division, 1979.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPodell, Joel, et al. Developing Sales Effectiveness: Cases, Exercises, and Role-playing Activities. First edition. Random House Business Division, 1979.
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