APA (7th ed.) Zitazioa

(1975). Preventing students from dropping out / Alexander W. Astin.

Chicago Style (17th ed.) Zitazioa

Preventing Students from Dropping Out / Alexander W. Astin. 1975.

MLA (9th ed.) Zitazioa

Preventing Students from Dropping Out / Alexander W. Astin. 1975.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.