APA (7th ed.) Citation

Mitton, G. E. (2009). The Children's Book of Stars. Project Gutenberg.

Chicago Style (17th ed.) Citation

Mitton, G. E. The Children's Book of Stars. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Mitton, G. E. The Children's Book of Stars. Project Gutenberg, 2009.

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