APA (7th ed.) Citation

United States. Department of the Interior & United States. Servicio de Parques Nacionales. (1993). Guiding principles of sustainable design. National Park Service.

Chicago Style (17th ed.) Citation

United States. Department of the Interior and United States. Servicio de Parques Nacionales. Guiding Principles of Sustainable Design. Denver, United States: National Park Service, 1993.

MLA (8th ed.) Citation

United States. Department of the Interior and United States. Servicio de Parques Nacionales. Guiding Principles of Sustainable Design. National Park Service, 1993.

Warning: These citations may not always be 100% accurate.