APA-referens (7:e uppl.)

Jelen, F. C. (1970). Cost and optimization engineering. McGraw-Hill.

Chicago-referens (17:e uppl.)

Jelen, Frederic Charles. Cost and Optimization Engineering. New York Maidenhead: McGraw-Hill, 1970.

MLA-referens (9:e uppl.)

Jelen, Frederic Charles. Cost and Optimization Engineering. McGraw-Hill, 1970.