Style de citation APA (7e éd.)

United States. Environmental Protection Agency. Region X. Pacific Northwest Region environmental quality profile. The Region.

Style de citation Chicago (17e éd.)

United States. Environmental Protection Agency. Region X. Pacific Northwest Region Environmental Quality Profile. Seattle, WA: The Region.

Style de citation MLA (8e éd.)

United States. Environmental Protection Agency. Region X. Pacific Northwest Region Environmental Quality Profile. The Region.

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