APA (7th ed.) Citation

Kay, R. (2011). The Go Ahead Boys and the Mysterious Old House. Project Gutenberg.

Chicago Style (17th ed.) Citation

Kay, Ross. The Go Ahead Boys and the Mysterious Old House. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Kay, Ross. The Go Ahead Boys and the Mysterious Old House. Project Gutenberg, 2011.

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