Dyfyniad APA

(1980). A history of technology & invention: Progress through the ages. London: John murray.

Dyfyniad Arddull Chicago

A History of Technology & Invention: Progress Through the Ages. London: John murray, 1980.

Dyfyniad MLA

A History of Technology & Invention: Progress Through the Ages. London: John murray, 1980.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.