@book{39530,
	author = {Berlin, Isaiah, and Hardy, Henry},
	title = {The hedgehog and the fox :},
	publisher = {Princeton University Press,},
	year = {2013},
	address = {Princeton, New Jersey :},
	edition = {Second Edition.},
	note = {Previously published: London : Weidenfeld & Nicolson, 1967.}
}