Kreitner, R. &. O. (1990). Business. Houghton.
Chicago-čujuhus (17. p.)Kreitner, Robert & Others. Business. Houghton, 1990.
MLA-čujuhus (9. p.)Kreitner, Robert & Others. Business. Houghton, 1990.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.