APA Citatie

Singer, B. C., & Wenzel, T. P. Estimated emission reductions from California's enhanced smog check program.

Chicago Style citaat

Singer, Brett C., en Thomas P. Wenzel. Estimated Emission Reductions From California's Enhanced Smog Check Program.

MLA citatie

Singer, Brett C., en Thomas P. Wenzel. Estimated Emission Reductions From California's Enhanced Smog Check Program.

Let op: Deze citaties zijn niet altijd 100% accuraat.