Kale, N. (2002). Marketing Research (N/A.). Vipul Prakashan.
Chicago Style aipamenaKale, N.G. Marketing Research. N/A. Mumbai: Vipul Prakashan, 2002.
MLA aipamenaKale, N.G. Marketing Research. N/A. Vipul Prakashan, 2002.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.