Dyfyniad APA

Gimpel, J. (1976). The medieval machine: The industrial revolution of the Middle Ages. New York: Penguin Books.

Dyfyniad Arddull Chicago

Gimpel, Jean. The Medieval Machine: The Industrial Revolution of the Middle Ages. New York: Penguin Books, 1976.

Dyfyniad MLA

Gimpel, Jean. The Medieval Machine: The Industrial Revolution of the Middle Ages. New York: Penguin Books, 1976.

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