Moto Guzzi Motorcycles: Since 1921: Leek, Jan: 9780764343445: Amazon.com: Books
Moto Guzzi: The Complete Story (Crowood Motoclassics): Pullen, Greg: 9781847975768: Amazon.com: Books
The Complete Book of Moto Guzzi: 100th Anniversary Edition Every Model Since 1921 (Complete Book Series): Falloon, Ian: 9780760367704: Amazon.com: Books
Moto Guzzi Big Twins (Motorcycle Color History): Field, Greg: 9780760303634: Amazon.com: Books
Moto Guzzi: 100 Years by Jeffrey T. Schnapp | Goodreads