APA (7th ed.) Citation

Heirigs, P. L. (1999). Determination of emissions credit and average test times for IM147 testing. Sierra Research, Inc..

Chicago Style (17th ed.) Citation

Heirigs, Philip L. Determination of Emissions Credit and Average Test Times for IM147 Testing. Sacramento, CA: Sierra Research, Inc., 1999.

MLA (9th ed.) Citation

Heirigs, Philip L. Determination of Emissions Credit and Average Test Times for IM147 Testing. Sierra Research, Inc., 1999.