@book{7704,
	author = {Date, C.J.},
	title = {Introduction to database systems},
	publisher = {Pearson Education Publisher},
	year = {2012},
	address = {New Delhi},
	edition = {8th },
	url = {https://libgen.is/book/index.php?md5=A140401906769255FE84D7D3D35E88E5}
}