@book{115809,
	author = {Rogers, Katherine M. A. and Scott, William N. and ebrary, Inc.},
	title = {Essential calculation skills},
	publisher = {McGraw Hill,},
	year = {2011.},
	series = {Nurses! Test yourself in},
	address = {Berkshire, England :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10476263}
}