Porsche 930 to 935: The Turbo Porsches (Veloce Classic Reprint): Amazon.co.uk: John Starkey: 9781787112469: Books
Porsche 911 (993): Carrera, Carrera 4 and turbocharged models. Model years 1994 to 1998 (Essential Buyer's Guide series), Streather, Adrian, eBook - Amazon.com