PARK, C. S. (1990). Advanced Engineering Economics. John Wiley & Sons.
Dyfyniad Arddull ChicagoPARK, Chan S. Advanced Engineering Economics. John Wiley & Sons, 1990.
Dyfyniad MLAPARK, Chan S. Advanced Engineering Economics. John Wiley & Sons, 1990.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.