Witzel, M. Tata: The Evolution of a Corporate Brand. Penguin.
Chicago-čujuhus (17. p.)Witzel, Morgen. Tata: The Evolution of a Corporate Brand. Penguin.
MLA-čujuhus (9. p.)Witzel, Morgen. Tata: The Evolution of a Corporate Brand. Penguin.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.