APA (7th ed.) Citation

Butler, E. P., & Crawford, W. (2013). The Great American Pie Company. Project Gutenberg.

Chicago Style (17th ed.) Citation

Butler, Ellis Parker, and Will Crawford. The Great American Pie Company. Project Gutenberg, 2013.

MLA (9th ed.) Citation

Butler, Ellis Parker, and Will Crawford. The Great American Pie Company. Project Gutenberg, 2013.

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