APA استشهاد

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

استشهاد بنمط شيكاغو

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

MLA استشهاد

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