Taylar, B. &. (2014). Research Methalogy. PHI.
Chicago Style aipamenaTaylar, BIll &Others. Research Methalogy. New Delhi: PHI, 2014.
MLA aipamenaTaylar, BIll &Others. Research Methalogy. PHI, 2014.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.