APA (7th ed.) Citation

Philips, F. C., & Harris, A. (2005). If Only etc. Project Gutenberg.

Chicago Style (17th ed.) Citation

Philips, F. C., and Augustus Harris. If only Etc. Project Gutenberg, 2005.

MLA (9th ed.) Citation

Philips, F. C., and Augustus Harris. If only Etc. Project Gutenberg, 2005.

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