Chapman,W A J. (1972). Workshop technology. Part 2: SI units (4th ed.). CBS publishers & distributors.
Dyfyniad Arddull ChicagoChapman,W A J. Workshop Technology. Part 2: SI Units. 4th ed. New Delhi: CBS publishers & distributors, 1972.
Dyfyniad MLAChapman,W A J. Workshop Technology. Part 2: SI Units. 4th ed. CBS publishers & distributors, 1972.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.