Gaya APA
Langdon, D., Everest, . (1995).
Spon`s civil engineering and highway work price book (Ed. ke-9).
London:
E \\n FN Spon.
Gaya MLA
Langdon, Davis., Everest, .
"Spon`s civil engineering and highway work price book".
Ed. ke-9
London:
E \\n FN Spon,
1995.
Text.