APA-referens (7:e uppl.)

Whelan, T. (1991). Nature tourism: Managing for the environment. Island Press.

Chicago-referens (17:e uppl.)

Whelan, Tensie. Nature Tourism: Managing for the Environment. Washington, D.C.: Island Press, 1991.

MLA-referens (9:e uppl.)

Whelan, Tensie. Nature Tourism: Managing for the Environment. Island Press, 1991.