APA (7th ed.) Citation

Machen, A. (2011). The Three Impostors or The Transmutations. Project Gutenberg.

Chicago Style (17th ed.) Citation

Machen, Arthur. The Three Impostors or The Transmutations. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Machen, Arthur. The Three Impostors or The Transmutations. Project Gutenberg, 2011.

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