FREUND, J. E. (1993). Elementary Business Statistics: The Modern Approach John E. Freud, Frank J. Williams, Benjamin M. Perles. Prentice Hall.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFREUND, John E. Elementary Business Statistics: The Modern Approach John E. Freud, Frank J. Williams, Benjamin M. Perles. Prentice Hall, 1993.
एमएलए (8वां संस्करण) प्रशस्ति पत्रFREUND, John E. Elementary Business Statistics: The Modern Approach John E. Freud, Frank J. Williams, Benjamin M. Perles. Prentice Hall, 1993.
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