Ingram, J. A. (1990). Statistics for business and economics. Harcourt Brace Jovanovich.
Chicago-čujuhus (17. p.)Ingram, John A. Statistics for Business and Economics. Orlando, Fl.: Harcourt Brace Jovanovich, 1990.
MLA-čujuhus (9. p.)Ingram, John A. Statistics for Business and Economics. Harcourt Brace Jovanovich, 1990.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.