APA-čujuhus (7. p.)
Kellerman, B. (2015). Hard times: Leadership in America. Stanford Business Books.
Chicago-čujuhus (17. p.)
Kellerman, Barbara. Hard Times: Leadership in America. Stanford, California: Stanford Business Books, 2015.
MLA-čujuhus (9. p.)
Kellerman, Barbara. Hard Times: Leadership in America. Stanford Business Books, 2015.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.