Cita APA (7th ed.)
Smith G Chrystal. (1976). Estimating for building and civil engineering works (6 th ed.). Newnes - Butter Worth.
Cita Chicago (17th ed.)
Smith G Chrystal. Estimating for Building and Civil Engineering Works. 6 th ed. London: Newnes - Butter Worth, 1976.
Cita MLA (9th ed.)
Smith G Chrystal. Estimating for Building and Civil Engineering Works. 6 th ed. Newnes - Butter Worth, 1976.
Atenció: Aquestes cites poden no estar 100% correctes.