Langdon, D., & Everest. (1997). Spon's mechanical and electrical services price book (28th ed.). London: E. & FN. Spon.
Παραπομπή Chicago StyleLangdon, Davis, and Everest. Spon's Mechanical and Electrical Services Price Book. 28th ed. London: E. & FN. Spon, 1997.
Παραπομπή MLALangdon, Davis, and Everest. Spon's Mechanical and Electrical Services Price Book. 28th ed. London: E. & FN. Spon, 1997.
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