APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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