APA (7th ed.) Citation

Clark, J. (2010). Penny Nichols Finds a Clue. Project Gutenberg.

Chicago Style (17th ed.) Citation

Clark, Joan. Penny Nichols Finds a Clue. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Clark, Joan. Penny Nichols Finds a Clue. Project Gutenberg, 2010.

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