APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Whelan, Tensie, and Peter A. A. Berle. Nature Tourism: Managing for the Environment. Washington: Island Press, 1991.

MLA (9th ed.) Citation

Whelan, Tensie, and Peter A. A. Berle. Nature Tourism: Managing for the Environment. Island Press, 1991.