@book{30159,
	author = {McConnell, Campbell R. and Brue, Stanley L.},
	title = {Economics: principles, problems, and policies/},
	publisher = {McGraw-Hill},
	year = {c2015},
	address = {New York,},
	edition = {20th ed.},
	note = {First ed. published in 1960 under title: Elementary economics: principles, problems, and policies.}
}