Park, C. S. (2007). Contemporary engineering economics (4th ed.). Pearson Prentice-Hall.
Dyfyniad Arddull ChicagoPark, Chan S. Contemporary Engineering Economics. 4th ed. Upper Saddle River, N.J: Pearson Prentice-Hall, 2007.
Dyfyniad MLAPark, Chan S. Contemporary Engineering Economics. 4th ed. Pearson Prentice-Hall, 2007.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.