Williams, A., & Pitkeathley, B. (2007). Executive Express: A Swift and Practical Route to Tomorrow's Top Jobs. Indiana Publishing House.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWilliams, Anthony, और Bill Pitkeathley. Executive Express: A Swift and Practical Route to Tomorrow's Top Jobs. New Delhi: Indiana Publishing House, 2007.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWilliams, Anthony, और Bill Pitkeathley. Executive Express: A Swift and Practical Route to Tomorrow's Top Jobs. Indiana Publishing House, 2007.
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