APA aipamena

(1999). Early Warning, Timely Response: A Guide to Safe Schools. U.S. Department of Education.

Chicago Style aipamena

Early Warning, Timely Response: A Guide to Safe Schools. U.S. Department of Education, 1999.

MLA aipamena

Early Warning, Timely Response: A Guide to Safe Schools. U.S. Department of Education, 1999.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.