Witzel Morgen. (2010). Tata: Evoluation of a Corporate Brand. Portfolio.
Chicago Style aipamenaWitzel Morgen. Tata: Evoluation of a Corporate Brand. New Delhi: Portfolio, 2010.
MLA aipamenaWitzel Morgen. Tata: Evoluation of a Corporate Brand. Portfolio, 2010.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.