APA (7th ed.) Citation

Montgomery, F. T., & Hawthorne, P. (2006). Billy Whiskers' Adventures. Project Gutenberg.

Chicago Style (17th ed.) Citation

Montgomery, Frances Trego, and Paul Hawthorne. Billy Whiskers' Adventures. Project Gutenberg, 2006.

MLA (9th ed.) Citation

Montgomery, Frances Trego, and Paul Hawthorne. Billy Whiskers' Adventures. Project Gutenberg, 2006.

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