LEWIS, B. T. (1999). Facility manager's operation and maintenance handbook. Mc Graw Hill.
Lua i Stíl Chicago (17ú heag.)LEWIS, Bernard T. Facility Manager's Operation and Maintenance Handbook. Mc Graw Hill, 1999.
Lua MLA (8ú heag.)LEWIS, Bernard T. Facility Manager's Operation and Maintenance Handbook. Mc Graw Hill, 1999.
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