Witzel, M. Tata: The Evolution of a Corporate Brand. Penguin.
Cita Chicago (17th ed.)Witzel, Morgen. Tata: The Evolution of a Corporate Brand. Penguin.
Cita MLA (9th ed.)Witzel, Morgen. Tata: The Evolution of a Corporate Brand. Penguin.
Atenció: Aquestes cites poden no estar 100% correctes.