International Hotel Association, International Hotels Environment Initiave, & United Nations Environment Programme (Francia). (1995). [Environmental action pack for hotels: Practical steps to benefit your business and the environment. UNEP.
Chicago-Zitierstil (17. Ausg.)International Hotel Association, International Hotels Environment Initiave, und United Nations Environment Programme (Francia). [Environmental Action Pack for Hotels: Practical Steps to Benefit Your Business and the Environment. Paris: UNEP, 1995.
MLA-Zitierstil (8. Ausg.)International Hotel Association, et al. [Environmental Action Pack for Hotels: Practical Steps to Benefit Your Business and the Environment. UNEP, 1995.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.