APA (7th ed.) Citation

MacDonald, G. (2010). The princess and the goblin. Project Gutenberg.

Chicago Style (17th ed.) Citation

MacDonald, George. The Princess and the Goblin. To be supplied: Project Gutenberg, 2010.

MLA (8th ed.) Citation

MacDonald, George. The Princess and the Goblin. Project Gutenberg, 2010.

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