Cita APA

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

Citación estilo Chicago

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

Cita MLA

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