Style de citation APA (7e éd.)

United States. Forest Service. Pacific Northwest Region. (2000). Columbia River Gorge National Scenic Area. The Service.

Style de citation Chicago (17e éd.)

United States. Forest Service. Pacific Northwest Region. Columbia River Gorge National Scenic Area. Hood River, OR: The Service, 2000.

Style de citation MLA (8e éd.)

United States. Forest Service. Pacific Northwest Region. Columbia River Gorge National Scenic Area. The Service, 2000.

Attention : ces citations peuvent ne pas être correctes à 100%.