APA (7th ed.) Citation

Alcott, L. M. The Mysterious Key and What It Opened.

Chicago Style (17th ed.) Citation

Alcott, Louisa May. The Mysterious Key and What It Opened.

MLA (9th ed.) Citation

Alcott, Louisa May. The Mysterious Key and What It Opened.

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