Παραπομπή σε μορφή APA (7η εκδ.)

American Association of Cost Engineers & Humphreys Kenneth K. (1991). Jelen's cost and optimization engineering (3rd ed.). McGraw-Hill.

Παραπομπή σε μορφή Chicago (17η εκδ.)

American Association of Cost Engineers και Humphreys Kenneth K. Jelen's Cost and Optimization Engineering. 3rd ed. McGraw-Hill, 1991.

Παραπομπή σε μορφή MLA (8th εκδ.)

American Association of Cost Engineers και Humphreys Kenneth K. Jelen's Cost and Optimization Engineering. 3rd ed. McGraw-Hill, 1991.