Krishna, K. (1998). A New model of quality. National Bureau of Economic Research.
Citazione stile Chigago Style (17a edizione)Krishna, Kala. A New Model of Quality. Cambridge: National Bureau of Economic Research, 1998.
Citatione MLA (9a ed.)Krishna, Kala. A New Model of Quality. National Bureau of Economic Research, 1998.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.