Dyfyniad APA

Riggs,James L, & Bedworth,D David. (1996). Engineering economics (4.). Tata McGraw Hill.

Dyfyniad Arddull Chicago

Riggs,James L, and Bedworth,D David. Engineering Economics. 4. New Delhi: Tata McGraw Hill, 1996.

Dyfyniad MLA

Riggs,James L, and Bedworth,D David. Engineering Economics. 4. Tata McGraw Hill, 1996.

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