APA (7th ed.) Citation

Owen, L. A. (2005). Cave Regions of the Ozarks and Black Hills. Project Gutenberg.

Chicago Style (17th ed.) Citation

Owen, Luella Agnes. Cave Regions of the Ozarks and Black Hills. Project Gutenberg, 2005.

MLA (9th ed.) Citation

Owen, Luella Agnes. Cave Regions of the Ozarks and Black Hills. Project Gutenberg, 2005.

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