APA (7th ed.) Citation

Hutchins, F. P., & Penninga, T. J. (1981). Testing of six engine oils in accordance with the "EPA recommended practice for testing, grading and labeling the fuel efficiency of motor vehicle engine oils". Test and Evaluation Branch, Emission Control Technology Division, Office of Mobile Source Air Pollution Control, Environmental Protection Agency.

Chicago Style (17th ed.) Citation

Hutchins, F. Peter, and Thomas J. Penninga. Testing of Six Engine Oils in Accordance with the "EPA Recommended Practice for Testing, Grading and Labeling the Fuel Efficiency of Motor Vehicle Engine Oils". [Ann Arbor, Mich.]: Test and Evaluation Branch, Emission Control Technology Division, Office of Mobile Source Air Pollution Control, Environmental Protection Agency, 1981.

MLA (9th ed.) Citation

Hutchins, F. Peter, and Thomas J. Penninga. Testing of Six Engine Oils in Accordance with the "EPA Recommended Practice for Testing, Grading and Labeling the Fuel Efficiency of Motor Vehicle Engine Oils". Test and Evaluation Branch, Emission Control Technology Division, Office of Mobile Source Air Pollution Control, Environmental Protection Agency, 1981.