@book{140892,
	author = {Waddams Price, Catherine},
	title = {Prepayment meters},
	publisher = {University of East Anglia},
	year = {2002},
	address = {Norwich},
	note = {Navegadores de Internet ; Adobe Acrobat (PDF)},
	url = {http://www.ccr.uea.ac.uk/papers/Prepayment%20Meters%20-%20the%20Consumer%20Perspective.pdf}
}