John E. Freund, F. J. W. a. B. M. P. Elementary business statistics the modern approach. Prentice Hall.
Chicago-viite (17. p.)John E. Freund, Frank J. Williams and Benjamin M. Perles. Elementary Business Statistics the Modern Approach. Prentice Hall.
MLA-viite (8. p.)John E. Freund, Frank J. Williams and Benjamin M. Perles. Elementary Business Statistics the Modern Approach. Prentice Hall.
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