APA (7th ed.) Citation

Lang, A. (2013). The Mystery of Mary Stuart. Project Gutenberg.

Chicago Style (17th ed.) Citation

Lang, Andrew. The Mystery of Mary Stuart. Project Gutenberg, 2013.

MLA (9th ed.) Citation

Lang, Andrew. The Mystery of Mary Stuart. Project Gutenberg, 2013.

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