APA (7th ed.) Citation

Harte, B. (2006). Susy, a Story of the Plains. Project Gutenberg.

Chicago Style (17th ed.) Citation

Harte, Bret. Susy, a Story of the Plains. Project Gutenberg, 2006.

MLA (9th ed.) Citation

Harte, Bret. Susy, a Story of the Plains. Project Gutenberg, 2006.

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