Dignen, B. (2007). Fifty ways to improve your presentation skills in English: Without too much effort. Orient BlackSwan.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDignen, Bob. Fifty Ways to Improve Your Presentation Skills in English: Without Too Much Effort. Hyderabad: Orient BlackSwan, 2007.
एमएलए (8वां संस्करण) प्रशस्ति पत्रDignen, Bob. Fifty Ways to Improve Your Presentation Skills in English: Without Too Much Effort. Orient BlackSwan, 2007.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.