APA (7th ed.) Zitazioa
UNESCO. (1958). Preparation of general secondary school curricula.
Chicago Style (17th ed.) Zitazioa
UNESCO. Preparation of General Secondary School Curricula. 1958.
MLA (9th ed.) Zitazioa
UNESCO. Preparation of General Secondary School Curricula. 1958.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.