CARD, David E. - KRUEGER, Alan B. Wages, school quality, and employment demand. 1st pub. Oxford : Oxford University Press, 2011. xiv, 309 s. IZA Prize in Labor Economics series. Dostupné na internetu: <http://www.gbv.de/dms/zbw/661517926.pdf> ISBN 978-0-19-969338-2.