Unesco. (1953). Directory of international scientific organizations ([2nd ed.].). UNESCO.
Chicago Style aipamenaUnesco. Directory of International Scientific Organizations. [2nd ed.]. [Paris]: UNESCO, 1953.
MLA aipamenaUnesco. Directory of International Scientific Organizations. [2nd ed.]. UNESCO, 1953.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.