WALTERS LILLY. (2000). SECRETS OF SUPERSTAR SPEAKERS: WISDOM FROM GREATEST MOTIVATORS OF OUR TIME AND WITH THOSE ? TATA MCGRAW-HILL.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWALTERS LILLY. SECRETS OF SUPERSTAR SPEAKERS: WISDOM FROM GREATEST MOTIVATORS OF OUR TIME AND WITH THOSE ? NEW DELHI: TATA MCGRAW-HILL, 2000.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWALTERS LILLY. SECRETS OF SUPERSTAR SPEAKERS: WISDOM FROM GREATEST MOTIVATORS OF OUR TIME AND WITH THOSE ? TATA MCGRAW-HILL, 2000.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.