APA (7th ed.) Citation

Muir, J. (2003). The Mountains of California. Project Gutenberg.

Chicago Style (17th ed.) Citation

Muir, John. The Mountains of California. Project Gutenberg, 2003.

MLA (9th ed.) Citation

Muir, John. The Mountains of California. Project Gutenberg, 2003.

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