Keller Gerald. (2012). Managerial Statistics (9th.). cengage learning.
Chicago-čujuhus (17. p.)Keller Gerald. Managerial Statistics. 9th. Delhi: cengage learning, 2012.
MLA-čujuhus (9. p.)Keller Gerald. Managerial Statistics. 9th. cengage learning, 2012.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.