Bajpai, N. (2015). Marketing Research (1st.). Pearson.
Chicago Style aipamenaBajpai, Naval. Marketing Research. 1st. Noida: Pearson, 2015.
MLA aipamenaBajpai, Naval. Marketing Research. 1st. Pearson, 2015.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.