Butier, W. H., & Panigirtzoglou, N. (1999). Liquidity traps: How to avoid them and how to escape them. National Bureau of Economic Research.
Citazione stile Chigago Style (17a edizione)Butier, Willem H., e Nikolaos Panigirtzoglou. Liquidity Traps: How to Avoid Them and How to Escape Them. Cambridge: National Bureau of Economic Research, 1999.
Citatione MLA (9a ed.)Butier, Willem H., e Nikolaos Panigirtzoglou. Liquidity Traps: How to Avoid Them and How to Escape Them. National Bureau of Economic Research, 1999.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.