Baldwin, Nick (1998): . Bideford, Devon, UK: Bay View Books, ISBN 1-901432-09-2. Campagna, Palmiro (2003): . Toronto, Ontario & Oxford, UK: Dundurn Press, ISBN 1-55002-438-8 Harlin, E.A.; Jenks, G.A. (1973): . Shepperton, Middlesex, UK: Ian Allen, ISBN 978-0-7110-0342-2. Holmes, Harry (2004): . Wiltshire, UK: Crowood Press, ISBN 1-86126-651-0. Jackson, Aubrey J. (1965): . London: Putnam, ISBN 0-85177-797-X. Molson, Ken M.; Taylor, Harold A. (1982): . Toronto: Putnam, ISBN 0-09-200211-0. Wood, Derek (1975): . New York: The Bobbs-Merrill Company, Inc., ISBN 0-672-52166-0.