@book{15069,
	author = {Thorpe, Edgar  and Thorpe, Showick},
	title = {The Pearson guide to the CDS examinations / },
	publisher = {Pearson Education},
	year = {2008},
	address = {Delhi },
	url = {http://www.loc.gov/catdir/toc/ecip0620/2006028544.html}
}