APA (7th ed.) Zitazioa

United States. Department of Education. What Works: Schools Without Drugs.

Chicago Style (17th ed.) Zitazioa

United States. Department of Education. What Works: Schools Without Drugs.

MLA (9th ed.) Zitazioa

United States. Department of Education. What Works: Schools Without Drugs.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.