Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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

Precaución: Estas citas no son 100% exactas.