APA (7th ed.) Citation

Schmeckebier, L. F., & Mills, E. A. (2013). Your National Parks With Detailed Information for Tourists. Project Gutenberg.

Chicago Style (17th ed.) Citation

Schmeckebier, Laurence F., and Enos Abijah Mills. Your National Parks With Detailed Information for Tourists. Project Gutenberg, 2013.

MLA (9th ed.) Citation

Schmeckebier, Laurence F., and Enos Abijah Mills. Your National Parks With Detailed Information for Tourists. Project Gutenberg, 2013.

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