APA (7th ed.) Citation

Helpman, E., & Trajtenberg, M. (1996). Diffusion of general purpose technologies. National Bureau of Economic Research.

Chicago Style (17th ed.) Citation

Helpman, Elhanan, and Manuel Trajtenberg. Diffusion of General Purpose Technologies. Cambridge: National Bureau of Economic Research, 1996.

MLA (9th ed.) Citation

Helpman, Elhanan, and Manuel Trajtenberg. Diffusion of General Purpose Technologies. National Bureau of Economic Research, 1996.