Koop, G. (2005). Analysis of economic data (2nd ed.). John Wiley.
Chicago-čujuhus (17. p.)Koop, Gary. Analysis of Economic Data. 2nd ed. Chichester: John Wiley, 2005.
MLA-čujuhus (9. p.)Koop, Gary. Analysis of Economic Data. 2nd ed. John Wiley, 2005.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.