APA (7th ed.) Citation

Baum, L. F. (1993). The Wonderful Wizard of Oz. Project Gutenberg.

Chicago Style (17th ed.) Citation

Baum, L. Frank. The Wonderful Wizard of Oz. Project Gutenberg, 1993.

MLA (9th ed.) Citation

Baum, L. Frank. The Wonderful Wizard of Oz. Project Gutenberg, 1993.

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