(1981). Survey of research 1981.
Chicago Style (17th ed.) ZitazioaSurvey of Research 1981. 1981.
MLA (9th ed.) ZitazioaSurvey of Research 1981. 1981.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
(1981). Survey of research 1981.
Chicago Style (17th ed.) ZitazioaSurvey of Research 1981. 1981.
MLA (9th ed.) ZitazioaSurvey of Research 1981. 1981.