@book{194542,
	author = {Grayling, A. C.},
	title = {Wittgenstein :},
	publisher = {Oxford University Press,},
	year = {2001.},
	address = {Oxford :},
	note = {Originally published: 1988.},
	url = {http://www.loc.gov/catdir/enhancements/fy0611/2001267926-t.html}
}