(1999). Early Warning, Timely Response: A Guide to Safe Schools. U.S. Department of Education.
Čikaški stil citiranja (17. izdanje)Early Warning, Timely Response: A Guide to Safe Schools. U.S. Department of Education, 1999.
MLA način citiranja (9. izdanje)Early Warning, Timely Response: A Guide to Safe Schools. U.S. Department of Education, 1999.
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