Hough, R., & Setright, L. (1973). history of the world's motor cycles. George Allen & Unwin.
Chicago Style aipamenaHough, Richard, and L.J.K Setright. History of the World's Motor Cycles. London: George Allen & Unwin, 1973.
MLA aipamenaHough, Richard, and L.J.K Setright. History of the World's Motor Cycles. George Allen & Unwin, 1973.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.