APA (7th ed.) Citation

Piper, H. B. (2006). The Edge of the Knife. Project Gutenberg.

Chicago Style (17th ed.) Citation

Piper, H. Beam. The Edge of the Knife. Project Gutenberg, 2006.

MLA (9th ed.) Citation

Piper, H. Beam. The Edge of the Knife. Project Gutenberg, 2006.

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