APA (7th ed.) Citation

The Ecotourism Society, Lindberg, K., & Hawkins, D. E. (1993). Ecotourism: A guide for planners and managers. The Ecotourism Society.

Chicago Style (17th ed.) Citation

The Ecotourism Society, Kreg Lindberg, and Donald E. Hawkins. Ecotourism: A Guide for Planners and Managers. North Bennington, Vermont: The Ecotourism Society, 1993.

MLA (9th ed.) Citation

The Ecotourism Society, et al. Ecotourism: A Guide for Planners and Managers. The Ecotourism Society, 1993.