Vas, L. (2003). Nine roads to success at work and in life. English Edition.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रVas, Luis. Nine Roads to Success at Work and in Life. Mumbai: English Edition, 2003.
एमएलए (9वां संस्करण) प्रशस्ति पत्रVas, Luis. Nine Roads to Success at Work and in Life. English Edition, 2003.
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