APA (7th ed.) Citation

Groner, A., & Colbron, G. I. (1999). The Case of the Pocket Diary Found in the Snow. Project Gutenberg.

Chicago Style (17th ed.) Citation

Groner, Auguste, and Grace Isabel Colbron. The Case of the Pocket Diary Found in the Snow. Project Gutenberg, 1999.

MLA (9th ed.) Citation

Groner, Auguste, and Grace Isabel Colbron. The Case of the Pocket Diary Found in the Snow. Project Gutenberg, 1999.

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