Cita APA (7a ed.)

Sigman, H. (2000). The pace of progress at Superfund sites: Policy goals and interest group influence. National Bureau of Economic Research.

Cita Chicago Style (17a ed.)

Sigman, Hilary. The Pace of Progress at Superfund Sites: Policy Goals and Interest Group Influence. Cambridge, MA: National Bureau of Economic Research, 2000.

Cita MLA (9a ed.)

Sigman, Hilary. The Pace of Progress at Superfund Sites: Policy Goals and Interest Group Influence. National Bureau of Economic Research, 2000.