Porsche Club of America. Maverick Region.Porsche Slipstream, Volume 10, Number 7, July 1971,
periodical,
July 1971;
Southlake, Texas.
(https://texashistory.unt.edu/ark:/67531/metapth899052/m1/1/:
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.