APA-referens (7:e uppl.)

HUMPHREYS , K. (1991). JELENS COST AND OPTIMIZATION ENGINEERING. MCGRAW HILL.

Chicago-referens (17:e uppl.)

HUMPHREYS , K.K. JELENS COST AND OPTIMIZATION ENGINEERING. NEW-YORK: MCGRAW HILL, 1991.

MLA-referens (9:e uppl.)

HUMPHREYS , K.K. JELENS COST AND OPTIMIZATION ENGINEERING. MCGRAW HILL, 1991.