Lichtenberg, F., & Potterie, B. v. P. d. l. (1996). International R & D spillovers: A re-examination. National Bureau of Economic Research.
Citazione stile Chigago Style (17a edizione)Lichtenberg, Frank, e Bruno van Pottelsberghe de la Potterie. International R & D Spillovers: A Re-examination. Cambridge: National Bureau of Economic Research, 1996.
Citatione MLA (9a ed.)Lichtenberg, Frank, e Bruno van Pottelsberghe de la Potterie. International R & D Spillovers: A Re-examination. National Bureau of Economic Research, 1996.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.