APA aipamena

Beins, B. C. (2019). Research Methods (4th.). Cambridge University Press.

Chicago Style aipamena

Beins, Bernard C. Research Methods. 4th. Cambridge University Press, 2019.

MLA aipamena

Beins, Bernard C. Research Methods. 4th. Cambridge University Press, 2019.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.