ANDERSON, David Ray, Dennis J. SWEENEY a Thomas Arthur WILLIAMS. Statistics for business and economics. 11th ed., rev. Mason: South-Western Cengage Learning, c2012.
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ROSS, Sheldon M. Introduction to probability and statistics for engineers and scientists. 4th ed. Amsterdam: Elsevier/Academic Press, c2009.
ISBN 978-0-12-370483-2.
FREUND, Rudolf Jakob, William J. WILSON a Donna L. MOHR. Statistical methods. 3rd ed. Burlington: Elsevier/Academic Press, c2010.
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