Dyfyniad APA

Grant, E. L. (1990). Principles of engineering economy. New York: John Wiley & Sons.

Dyfyniad Arddull Chicago

Grant, Eugene Lodewick. Principles of Engineering Economy. New York: John Wiley & Sons, 1990.

Dyfyniad MLA

Grant, Eugene Lodewick. Principles of Engineering Economy. New York: John Wiley & Sons, 1990.

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