Παραπομπή APA

Blank,Leland P E. (1998). Engneering economy (4.). MacGraw Hill.

Παραπομπή Chicago Style

Blank,Leland P E. Engneering Economy. 4. Singapore: MacGraw Hill, 1998.

Παραπομπή MLA

Blank,Leland P E. Engneering Economy. 4. MacGraw Hill, 1998.