Barr, N. (2012). Economics of the Welfare State (5th.). Oxford.
Chicago Style (17th ed.) CitationBarr, Nicholas. Economics of the Welfare State. 5th. UK: Oxford, 2012.
MLA引文Barr, Nicholas. Economics of the Welfare State. 5th. Oxford, 2012.
警告:這些引文格式不一定是100%准確.