APA (7th ed.) Citation

Nowak, D. J. (2016). The urban forest of Philadelphia. U.S. Department of Agriculture, U.S. Forest Service, Northern Research Station.

Chicago Style (17th ed.) Citation

Nowak, David J. The Urban Forest of Philadelphia. Newtown Square, PA: U.S. Department of Agriculture, U.S. Forest Service, Northern Research Station, 2016.

MLA (9th ed.) Citation

Nowak, David J. The Urban Forest of Philadelphia. U.S. Department of Agriculture, U.S. Forest Service, Northern Research Station, 2016.