APA (7th ed.) Citation

Thoreau, H. D. Index of the Project Gutenberg Works of Henry David Thoreau.

Chicago Style (17th ed.) Citation

Thoreau, Henry David. Index of the Project Gutenberg Works of Henry David Thoreau.

MLA (9th ed.) Citation

Thoreau, Henry David. Index of the Project Gutenberg Works of Henry David Thoreau.

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