Hough, R. (1973). A history of the world’s motorcycles. New York: Harper & Row.
Chicago Style aipamenaHough, Richard. A History of the World’s Motorcycles. New York: Harper & Row, 1973.
MLA aipamenaHough, Richard. A History of the World’s Motorcycles. New York: Harper & Row, 1973.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.