Intervention | Wolters Kluwer Medknow Publications. Cambridge University Press.
Chicago Style (17th ed.) ZitazioaIntervention | Wolters Kluwer Medknow Publications. Cambridge University Press.
MLA (9th ed.) ZitazioaIntervention | Wolters Kluwer Medknow Publications. Cambridge University Press.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.