AECOM (Firm). (2015). Spon's civil engineering and highway works price book: 2015 (Twenty-ninth edition.). CRC Press.
Chicago Style (17. basım) AtıfAECOM (Firm). Spon's Civil Engineering and Highway Works Price Book: 2015. Twenty-ninth edition. Boca Raton, FL: CRC Press, 2015.
MLA (9th ed.) AtıfAECOM (Firm). Spon's Civil Engineering and Highway Works Price Book: 2015. Twenty-ninth edition. CRC Press, 2015.
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