@book{12179,
	author = {Samuelson, Paul A.  and Nordhaus, William D.},
	title = {Economics},
	publisher = {McGraw Hill},
	year = {2013,2015},
	address = {New Delhi},
	edition = {19th ed.},
	note = {Indian adaptation by Sudip Chaudhuri and Anindya Sen}
}