Dyfyniad APA

GRANT, E. L. Principles of engineering economy. John Wiley and Sons.

Dyfyniad Arddull Chicago

GRANT, Eugene L. Principles of Engineering Economy. John Wiley and Sons.

Dyfyniad MLA

GRANT, Eugene L. Principles of Engineering Economy. John Wiley and Sons.

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