Leffingwell, Randy Porsche 911 : perfection by design Randy Leffingwell. - St. Paul, MN Motorbooks 2005. - 352 p. ill. (some col.) 32 cm. Includes index. ISBN: 0760320926 LCCN: 2005053123 Subjects--Topical Terms: Porsche 911 automobile. LC Class. No.: TL215.P75 / L43 2005 Dewey Class. No.: 629.222/2