Usher , A. P. (1929). A history of mechanical inventions. McGraw-Hill.
Citación estilo ChicagoUsher , Abbott Payson. A History of Mechanical Inventions. New York: McGraw-Hill, 1929.
Cita MLAUsher , Abbott Payson. A History of Mechanical Inventions. McGraw-Hill, 1929.
Warning: These citations may not always be 100% accurate.