@book{75733,
	author = {Anwar Hamad Sifeddin and Ahmed Badreldin Khalil , },
	title = {An evaluation of systems analysis tools , methodologies and modeling / },
	publisher = {Anwar Hamad Sifeddin , },
	year = {2007},
	address = {Cairo : },
	url = {http://172.23.153.220/th.pdf}
}