(1999). Early Warning, Timely Response: A Guide to Safe Schools. U.S. Department of Education.
Chicago Style (17. basım) AtıfEarly Warning, Timely Response: A Guide to Safe Schools. U.S. Department of Education, 1999.
MLA (9th ed.) AtıfEarly Warning, Timely Response: A Guide to Safe Schools. U.S. Department of Education, 1999.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..