@book{709,
	author = {"Hoffer, Jeffrey A."},
	title = {Modern systems analysis and design},
	publisher = {The Benjamin/ cummings publishing co.},
	address = {Menlo Park},
	url = {https://libgen.is/book/index.php?md5=0C7FD5EE4ED4F1E89E89A736AC6A39A0}
}