APA (7th ed.) Citation

(2011). The Butterflys' Ball Mother's Series. Project Gutenberg.

Chicago Style (17th ed.) Citation

The Butterflys' Ball Mother's Series. Project Gutenberg, 2011.

MLA (9th ed.) Citation

The Butterflys' Ball Mother's Series. Project Gutenberg, 2011.

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