Cita APA

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

Citación estilo Chicago

Whelan, Tensie, y Peter A.A Berle. Nature Tourism: Managing for the Environment. Washington, D. C.: Island, 1991.

Cita MLA

Whelan, Tensie, y Peter A.A Berle. Nature Tourism: Managing for the Environment. Washington, D. C.: Island, 1991.