«The Used Car Problem». Garage Organization and Management. Taylor & Francis. pp. 259-260. Consultado el 26 de octubre de 2012. «(for the purposes of this British publication) "In order to avoid confusion, however, the universally understood terms 'Tourer', 'Coupé', 'Saloon', 'Limousine', etc., have been adopted, adding the American term 'Roadster' as the two-seater edition of the tourer."».
Haajanen, Lennart W. (2003). Illustrated Dictionary of Automobile Body Styles. Illustrations by Bertil Nydén; foreword by Karl Ludvigsen. Jefferson, NC USA: McFarland. p. 113. ISBN0-7864-1276-3. LCCN2002014546.
Porter, Noah, ed. (1898). «Roadster». Webster's International Dictionary of the English Language. Springfield, MA US: G. and C. Merriam. p. 1246. LCCN98001281.
