Cita APA (7th ed.)

Usher , A. P. (1929). A history of mechanical inventions. McGraw-Hill.

Cita Chicago (17th ed.)

Usher , Abbott Payson. A History of Mechanical Inventions. New York: McGraw-Hill, 1929.

Cita MLA (9th ed.)

Usher , Abbott Payson. A History of Mechanical Inventions. McGraw-Hill, 1929.