Welfens, P. J. J. (2008). Innovations in macroeconomics ([2nd ed.].). Springer.
芝加哥风格引文Welfens, Paul J. J. Innovations in Macroeconomics. [2nd ed.]. Berlin: Springer, 2008.
MLA引文Welfens, Paul J. J. Innovations in Macroeconomics. [2nd ed.]. Springer, 2008.
警告：这些引文格式不一定是100％准确.