@book{389695,
	author = {ESTADOS UNIDOS, U.S. Department of Homeland Security. Secret Service},
	title = {Campus attacks [Documento elecrónico]},
	publisher = {U.S. Secret Service; Office of Safe and Drug-Free Schools; Federal Bureau of Investigation},
	year = {2010},
	address = {Washington, D.C.},
	note = {Ficheiro de 681 KB em formato pdf (40 p.). Também disponível em: https://www.secretservice.gov/ntac.shtml; https://www2.ed.gov/about/offices/list/osdfs/resources.html; https://www.fbi.gov/publications/campus/campus.pdf. Acedido em 30 de Agosto de 2010.}
}