APA aipamena

(1987). NATIONAL Institute year book 1989. : Gabumo Publishers.

Chicago Style aipamena

NATIONAL Institute Year Book 1989. : Gabumo Publishers, 1987.

MLA aipamena

NATIONAL Institute Year Book 1989. : Gabumo Publishers, 1987.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.