Porsche Club of America. Maverick Region.Slipstream, Volume 28, Number 7, July 1990,
periodical,
July 1990;
Southlake, Texas.
(https://texashistory.unt.edu/ark:/67531/metapth901507/m1/36/:
accessed July 17, 2024),
University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.;
crediting Maverick Region Porsche Club of America.