APA引文

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

Chicago Style (17th ed.) Citation

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

MLA引文

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

警告：這些引文格式不一定是100％准確.