VRIES, M. A. D. (1995). Professional Secretary's Encyclopedic Dictionary. Prentice Hall.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रVRIES, Mary A. De. Professional Secretary's Encyclopedic Dictionary. Prentice Hall, 1995.
एमएलए (8वां संस्करण) प्रशस्ति पत्रVRIES, Mary A. De. Professional Secretary's Encyclopedic Dictionary. Prentice Hall, 1995.
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