"2012 Rules – American Le Mans Series"(PDF). International Motor Sports Association. p. 39, Standing Supplementary Regulations, Section 1, Part 2. Archived from the original(PDF) on February 20, 2013. Retrieved April 3, 2012.
"2012 Rules – American Le Mans Series"(PDF). International Motor Sports Association. p. 39, Standing Supplementary Regulations, Section 1, Part 2. Archived from the original(PDF) on February 20, 2013. Retrieved April 3, 2012.