Jones, C. I., & Williams, J. C. (1999). Too much of a good thingn: The economics of investment in R%D. National Bureau of Economic Research.
Chicago-referens (17:e uppl.)Jones, Charles I., och John C. Williams. Too Much of a Good Thingn: The Economics of Investment in R%D. Cambridge: National Bureau of Economic Research, 1999.
MLA-referens (9:e uppl.)Jones, Charles I., och John C. Williams. Too Much of a Good Thingn: The Economics of Investment in R%D. National Bureau of Economic Research, 1999.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.