@book{71006,
	author = {Waters, James R. and Mcgrath, sheree A.},
	title = {Introduction to law enforcement / },
	publisher = {Charles E. merrill,},
	year = {1974.},
	address = {America : },
	url = {https://fll.law.cu.edu.eg/fulltext/bks/B10-08920.pdf}
}