Levinson, S. The power to get things done. Perigee.
Chicago-čujuhus (17. p.)Levinson, Steve. The Power to Get Things Done. Perigee.
MLA-čujuhus (9. p.)Levinson, Steve. The Power to Get Things Done. Perigee.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.