Discover America Implementation Task Force, Estados Unidos. Travel Data Center, & Travel Industry Association of America. (1992). Discover America: Tourism and the environment : a guide to challenges and opportunities for travel industry businesses. Travel Industry Association of America.
Cita Chicago Style (17a ed.)Discover America Implementation Task Force, Estados Unidos. Travel Data Center, y Travel Industry Association of America. Discover America: Tourism and the Environment : A Guide to Challenges and Opportunities for Travel Industry Businesses. Washington, D.C.: Travel Industry Association of America, 1992.
Cita MLA (9a ed.)Discover America Implementation Task Force, et al. Discover America: Tourism and the Environment : A Guide to Challenges and Opportunities for Travel Industry Businesses. Travel Industry Association of America, 1992.
