@book{26140,
	author = {Gupta, Kamlesh and Chawla, Parminder Kaur},
	title = {An introduction to computer  science/by Kamlesh Gupta and Parminder Kaur Chawla },
	publisher = {Kalyani Publishers;},
	year = {2009.},
	address = {Ludhiana:},
	edition = {1st.ed.}
}