APA (7th ed.) Citation

Project Gutenberg & Thoreau, H. D. (1997). Walking. Project Gutenberg Literary Archive Foundation.

Chicago Style (17th ed.) Citation

Project Gutenberg and Henry David Thoreau. Walking. Salt Lake City: Project Gutenberg Literary Archive Foundation, 1997.

MLA (9th ed.) Citation

Project Gutenberg and Henry David Thoreau. Walking. Project Gutenberg Literary Archive Foundation, 1997.

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