Παραπομπή APA

Ellison, S. F., Wolfram, C. D., & National Bureau of Economic Research. (2001). Pharmaceutical prices and political activity. Cambridge: National Bureau of Economic Research.

Παραπομπή Chicago Style

Ellison, Sara Fisher., Catherine D. Wolfram, and National Bureau of Economic Research. Pharmaceutical Prices and Political Activity. Cambridge: National Bureau of Economic Research, 2001.

Παραπομπή MLA

Ellison, Sara Fisher., Catherine D. Wolfram, and National Bureau of Economic Research. Pharmaceutical Prices and Political Activity. Cambridge: National Bureau of Economic Research, 2001.

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