Coopman, S. J., & Lull, J. (2012). Public speaking: The evolving art (Enhanced second edition, International edition.). Wadsworth Cengage Learning.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCoopman, Stephanie J., और James Lull. Public Speaking: The Evolving Art. Enhanced second edition, International edition. Australia: Wadsworth Cengage Learning, 2012.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCoopman, Stephanie J., और James Lull. Public Speaking: The Evolving Art. Enhanced second edition, International edition. Wadsworth Cengage Learning, 2012.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.