E. & F.N. Spon & Davis Langdon Consultancy. (2009). Spon's civil engineering and highway works price book (23rd ed.). Taylor & Francis.
Citace podle Chicago (17th ed.)E. & F.N. Spon a Davis Langdon Consultancy. Spon's Civil Engineering and Highway Works Price Book. 23rd ed. London: Taylor & Francis, 2009.
Citace podle MLA (8th ed.)E. & F.N. Spon a Davis Langdon Consultancy. Spon's Civil Engineering and Highway Works Price Book. 23rd ed. Taylor & Francis, 2009.
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