@book{4311,
	author = {Bell douglas},
	title = {Software engineering for students},
	publisher = {Pearson Education Publisher},
	year = {2012},
	address = {New Dehli},
	edition = {4th},
	url = {https://libgen.is/book/index.php?md5=631CCEB830013629A7334FA05DF6C449}
}