Cita APA (7th ed.)

E. & F.N. Spon & Davis Langdon Consultancy. (2009). Spon's civil engineering and highway works price book (23rd ed.). Taylor & Francis.

Cita Chicago (17th ed.)

E. & F.N. Spon i Davis Langdon Consultancy. Spon's Civil Engineering and Highway Works Price Book. 23rd ed. London: Taylor & Francis, 2009.

Cita MLA (8th ed.)

E. & F.N. Spon i Davis Langdon Consultancy. Spon's Civil Engineering and Highway Works Price Book. 23rd ed. Taylor & Francis, 2009.