Andreoni, J., & Bergstrom, T. (1992). Do government subsidies increase the private supply of public goods? Social Systems Research Institute, University of Wisconsin-Madison.
Lua i Stíl Chicago (17ú heag.)Andreoni, James, agus Ted Bergstrom. Do Government Subsidies Increase the Private Supply of Public Goods? Madison, WI: Social Systems Research Institute, University of Wisconsin-Madison, 1992.
Lua MLA (9ú heag.)Andreoni, James, agus Ted Bergstrom. Do Government Subsidies Increase the Private Supply of Public Goods? Social Systems Research Institute, University of Wisconsin-Madison, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.