APA
Barro R. J., Redlick Charles J & National Bureau Of Economic Research. (2009). Macroeconomic effects from government purchases and taxes. Cambridge: NBER.
Chicago
Barro Robert J, Redlick Charles J and National Bureau Of Economic Research. 2009. Macroeconomic effects from government purchases and taxes. Cambridge: NBER.
Harvard
Barro R. J., Redlick Charles J and National Bureau Of Economic Research. (2009). Macroeconomic effects from government purchases and taxes. Cambridge: NBER.
MLA
Barro Robert J, Redlick Charles J and National Bureau Of Economic Research. Macroeconomic effects from government purchases and taxes. Cambridge: NBER. 2009.