APA (7th ed.) Zitazioa

(1981). Improving guidance programs / Norman C. Gysbers, Earl J. Moore.

Chicago Style (17th ed.) Zitazioa

Improving Guidance Programs / Norman C. Gysbers, Earl J. Moore. 1981.

MLA (9th ed.) Zitazioa

Improving Guidance Programs / Norman C. Gysbers, Earl J. Moore. 1981.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.