APA aipamena

Berndt, E. R., Pindyck, R. S., & Azoulay, P. (1999). Network effects and diffusion in pharmaceutical markets: Antiulcer drugs. National Bureau of Economic Research.

Chicago Style aipamena

Berndt, Ernst R., Robert S. Pindyck, and Pierre Azoulay. Network Effects and Diffusion in Pharmaceutical Markets: Antiulcer Drugs. Cambridge: National Bureau of Economic Research, 1999.

MLA aipamena

Berndt, Ernst R., et al. Network Effects and Diffusion in Pharmaceutical Markets: Antiulcer Drugs. National Bureau of Economic Research, 1999.