World Tourism Organization. (2011). Analysis on energy use by European hotels: Online survey and desk research (Revised version.). Hotel energy solutions.
Chicago Style (17th ed.) CitationWorld Tourism Organization. Analysis on Energy Use by European Hotels: Online Survey and Desk Research. Revised version. Madrid: Hotel energy solutions, 2011.
MLA (9th ed.) CitationWorld Tourism Organization. Analysis on Energy Use by European Hotels: Online Survey and Desk Research. Revised version. Hotel energy solutions, 2011.
Warning: These citations may not always be 100% accurate.