Costello patrick j.m. (2005). Action Reserch. Continuum Publ.
Chicago Style aipamenaCostello patrick j.m. Action Reserch. London: Continuum Publ, 2005.
MLA aipamenaCostello patrick j.m. Action Reserch. Continuum Publ, 2005.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.