Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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