APA (7th ed.) Citation

Griffith, H. S., & Jones, F. D. (2012). Letty and the Twins. Project Gutenberg.

Chicago Style (17th ed.) Citation

Griffith, Helen Sherman, and Frances D. Jones. Letty and the Twins. Project Gutenberg, 2012.

MLA (9th ed.) Citation

Griffith, Helen Sherman, and Frances D. Jones. Letty and the Twins. Project Gutenberg, 2012.

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