Usher , A. P. (1929). A history of mechanical inventions. McGraw-Hill.
Chicago Style aipamenaUsher , Abbott Payson. A History of Mechanical Inventions. New York: McGraw-Hill, 1929.
MLA aipamenaUsher , Abbott Payson. A History of Mechanical Inventions. McGraw-Hill, 1929.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.