APA (7th ed.) Citation

Butler, E. P., & Preston, M. W. (2013). The Incubator Baby. Project Gutenberg.

Chicago Style (17th ed.) Citation

Butler, Ellis Parker, and May Wilson Preston. The Incubator Baby. Project Gutenberg, 2013.

MLA (9th ed.) Citation

Butler, Ellis Parker, and May Wilson Preston. The Incubator Baby. Project Gutenberg, 2013.

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