Lloyd Gutteridge. (2012). IB Business and Management Study Guide: Oxford IB Diploma Program (Study Guide.). Oxford University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLloyd Gutteridge. IB Business and Management Study Guide: Oxford IB Diploma Program. Study Guide. Oxford University Press, 2012.
एमएलए (9वां संस्करण) प्रशस्ति पत्रLloyd Gutteridge. IB Business and Management Study Guide: Oxford IB Diploma Program. Study Guide. Oxford University Press, 2012.
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