Cita APA (7th ed.)

Usher, A. P. (1988). A history of mechanical inventions. Dover.

Cita Chicago (17th ed.)

Usher, Abbott Payson. A History of Mechanical Inventions. Nueva York: Dover, 1988.

Cita MLA (9th ed.)

Usher, Abbott Payson. A History of Mechanical Inventions. Dover, 1988.