(1999). Early Warning, Timely Response: A Guide to Safe Schools. U.S. Department of Education.
Citazione stile Chigago Style (17a edizione)Early Warning, Timely Response: A Guide to Safe Schools. U.S. Department of Education, 1999.
Citatione MLA (9a ed.)Early Warning, Timely Response: A Guide to Safe Schools. U.S. Department of Education, 1999.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.