Original Porsche 924/944/968: The Guide to All Models 1975-95 Including Turbos and Limited Edition (Original Series): Peter Morgan, Simon Clay, Dieter Rebmann: 0635857000790: Amazon.com: Books
Rare Porsche 968 Turbo S One Of Only 14 In The World | CarBuzz
Porsche 924/928/944/968: The Complete Story (Crowood Autoclassics): Smale Sm, Glen: 9781785000393: Amazon.com: Books
1993 Porsche 968 Turbo S | Hagerty Insider
Porsche 968 Turbo S (1993 - 1994) - Stuttcars
The Porsche 968 Turbo S is Fast and Very Very Rare - Rennlist - Porsche Discussion Forums