Sawruk, John M. (26–30 September 1977). Pontiac's New 2.5 Litre 4 Cylinder Engine(PDF). Society of Automotive Engineers: Passenger Car Meeting. Detroit. pp. 1–2. Archived from the original(PDF) on 5 February 2018. Retrieved 10 August 2019.
Sawruk, John M. (26–30 September 1977). Pontiac's New 2.5 Litre 4 Cylinder Engine(PDF). Society of Automotive Engineers: Passenger Car Meeting. Detroit. pp. 1–2. Archived from the original(PDF) on 5 February 2018. Retrieved 10 August 2019.