APA引文

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

Chicago Style (17th ed.) Citation

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

MLA引文

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

警告：這些引文格式不一定是100％准確.