APA aipamena

Lichtenberg, F., & Potterie, B. v. P. d. l. (1996). International R & D spillovers: A re-examination. National Bureau of Economic Research.

Chicago Style aipamena

Lichtenberg, Frank, and Bruno van Pottelsberghe de la Potterie. International R & D Spillovers: A Re-examination. Cambridge: National Bureau of Economic Research, 1996.

MLA aipamena

Lichtenberg, Frank, and Bruno van Pottelsberghe de la Potterie. International R & D Spillovers: A Re-examination. National Bureau of Economic Research, 1996.