Porsche Club of America. Maverick Region.Porsche Slipstream, Volume 6, Number 6, May 1968,
periodical,
May 1968;
Southlake, Texas.
(https://texashistory.unt.edu/ark:/67531/metapth848868/m1/3/:
accessed April 26, 2024),
University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu;
crediting Maverick Region Porsche Club of America.