Cita APA (7th ed.)
Sandy, R. (1990). Statistics for business and economics. McGraw-Hill.
Cita Chicago (17th ed.)
Sandy, Robert. Statistics for Business and Economics. New Yourk: McGraw-Hill, 1990.
Cita MLA (9th ed.)
Sandy, Robert. Statistics for Business and Economics. McGraw-Hill, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.