Dyfyniad APA

Grant, E. L., Leavenworth, R. S., & Ireson, W. G. (1982). Principles of engineering economy (7th ed.). John Wiley.

Dyfyniad Arddull Chicago

Grant, Eugene L., Richard S. Leavenworth, and William Grant Ireson. Principles of Engineering Economy. 7th ed. New York: John Wiley, 1982.

Dyfyniad MLA

Grant, Eugene L., et al. Principles of Engineering Economy. 7th ed. John Wiley, 1982.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.