Style de citation APA (7e éd.)

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

Style de citation Chicago (17e éd.)

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

Style de citation MLA (9e éd.)

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