APA aipamena

Croucher, R. M. (1976). The Observer's Book of Motorcycles. London: Frederick Warne & CO LTD.

Chicago Style aipamena

Croucher, Robert M. The Observer's Book of Motorcycles. London: Frederick Warne & CO LTD, 1976.

MLA aipamena

Croucher, Robert M. The Observer's Book of Motorcycles. London: Frederick Warne & CO LTD, 1976.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.