Freund, J. E., Williams, F. J., & Perles, B. M. (1988). Elementary business statistics: The modern approach (Fifth edition.). Prentice Hall.
Chicago Style (17. basım) AtıfFreund, John E., Frank Jefferson Williams, ve Benjamin M. Perles. Elementary Business Statistics: The Modern Approach. Fifth edition. Englewood Cliffs, N.J.: Prentice Hall, 1988.
MLA (8th ed.) AtıfFreund, John E., et al. Elementary Business Statistics: The Modern Approach. Fifth edition. Prentice Hall, 1988.
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