Helpman, E., & Persson, T. (1998). Lobbying and legislative bargaining. National Bureau of Economic Research.
Chicago-viite (17. p.)Helpman, Elhanan, ja Torsten Persson. Lobbying and Legislative Bargaining. Cambridge: National Bureau of Economic Research, 1998.
MLA-viite (9. p.)Helpman, Elhanan, ja Torsten Persson. Lobbying and Legislative Bargaining. National Bureau of Economic Research, 1998.
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