PARK, C. S., & SHARP-BETTE, G. P. (1990). Advanced engineering economics. John Wiley and Sons.
Dyfyniad Arddull ChicagoPARK, Chan S., and Gunter P. SHARP-BETTE. Advanced Engineering Economics. New York: John Wiley and Sons, 1990.
Dyfyniad MLAPARK, Chan S., and Gunter P. SHARP-BETTE. Advanced Engineering Economics. John Wiley and Sons, 1990.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.