BENTLEY TREVOR J. (1980). PRACTICAL COST REDUCTION. MCGRAW-HILL.
Chicago Style aipamenaBENTLEY TREVOR J. PRACTICAL COST REDUCTION. NEW DELHI: MCGRAW-HILL, 1980.
MLA aipamenaBENTLEY TREVOR J. PRACTICAL COST REDUCTION. MCGRAW-HILL, 1980.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.