APA Citation

Smith, D. L., & Gill, K. (2015). Parks directory of the United States. Omnigraphics.

Chicago Style Citation

Smith, Darren L., and Kay Gill. Parks Directory of the United States. Omnigraphics, 2015.

MLA Citation

Smith, Darren L., and Kay Gill. Parks Directory of the United States. Omnigraphics, 2015.

Warning: These citations may not always be 100% accurate.