APA (7th ed.) Citation

Tarkington, B., Brehm, W., & Gilbert, C. A. (2006). Gentle Julia. Project Gutenberg.

Chicago Style (17th ed.) Citation

Tarkington, Booth, Worth Brehm, and C. Allan Gilbert. Gentle Julia. Project Gutenberg, 2006.

MLA (9th ed.) Citation

Tarkington, Booth, et al. Gentle Julia. Project Gutenberg, 2006.

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