Keith, W. M., & Lundberg, C. O. (2020). Public speaking: Choices and responsibility (Third edition.). Cengage.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKeith, William M., और Christian O. Lundberg. Public Speaking: Choices and Responsibility. Third edition. Boston, MA: Cengage, 2020.
एमएलए (9वां संस्करण) प्रशस्ति पत्रKeith, William M., और Christian O. Lundberg. Public Speaking: Choices and Responsibility. Third edition. Cengage, 2020.
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