Patnaik, K. (2008). What customers really want. Lotus press.
Chicago Style aipamenaPatnaik, Keshu. What Customers Really Want. New Delhi: Lotus press, 2008.
MLA aipamenaPatnaik, Keshu. What Customers Really Want. Lotus press, 2008.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.