APA

United States, . (2019). Greenhouse gas emissions and removals from forest land and urban trees in the United States, 1990-2017. Newtown Square, PA: United States Department of Agriculture, Forest Service, Northern Research Station.

Chicago

United States, . 2019. Greenhouse gas emissions and removals from forest land and urban trees in the United States, 1990-2017. Newtown Square, PA: United States Department of Agriculture, Forest Service, Northern Research Station.

Harvard

United States, . (2019). Greenhouse gas emissions and removals from forest land and urban trees in the United States, 1990-2017. Newtown Square, PA: United States Department of Agriculture, Forest Service, Northern Research Station.

MLA

United States, . Greenhouse gas emissions and removals from forest land and urban trees in the United States, 1990-2017. Newtown Square, PA: United States Department of Agriculture, Forest Service, Northern Research Station. 2019.