APA (7th ed.) Citation

Ingersoll, E. (2012). The Ice Queen. Project Gutenberg.

Chicago Style (17th ed.) Citation

Ingersoll, Ernest. The Ice Queen. Project Gutenberg, 2012.

MLA (9th ed.) Citation

Ingersoll, Ernest. The Ice Queen. Project Gutenberg, 2012.

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