Twist, C. (1997). Macmillan Revised ENCYCLOPEDIA of SCIENCE Fuel and Power 9. Macmillan Reference.
Dyfyniad Arddull ChicagoTwist, Clint. Macmillan Revised ENCYCLOPEDIA of SCIENCE Fuel and Power 9. Macmillan Reference, 1997.
Dyfyniad MLATwist, Clint. Macmillan Revised ENCYCLOPEDIA of SCIENCE Fuel and Power 9. Macmillan Reference, 1997.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.