APA (7th ed.) Citation

Heyliger, W. (2013). Detectives, Inc. A Mystery Story for Boys. Project Gutenberg.

Chicago Style (17th ed.) Citation

Heyliger, William. Detectives, Inc. A Mystery Story for Boys. Project Gutenberg, 2013.

MLA (9th ed.) Citation

Heyliger, William. Detectives, Inc. A Mystery Story for Boys. Project Gutenberg, 2013.

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