APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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