APA (7th ed.) Citation

Twain, M. (2004). Some Rambling Notes of an Idle Excursion. Project Gutenberg.

Chicago Style (17th ed.) Citation

Twain, Mark. Some Rambling Notes of an Idle Excursion. Project Gutenberg, 2004.

MLA (9th ed.) Citation

Twain, Mark. Some Rambling Notes of an Idle Excursion. Project Gutenberg, 2004.

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