@book{31840,
	author = {Prem Sunder and Sunder, Prem},
	title = {Principles of educational system},
	publisher = {Khel Sahitya Kendra},
	year = {2009},
	address = {New Delhi},
	url = {http://www.loc.gov/catdir/toc/ecip0721/2007025342.html}
}