APA (7th ed.) Citation

Garis, H. R. (2004). Umboo, the Elephant. Project Gutenberg.

Chicago Style (17th ed.) Citation

Garis, Howard Roger. Umboo, the Elephant. Project Gutenberg, 2004.

MLA (9th ed.) Citation

Garis, Howard Roger. Umboo, the Elephant. Project Gutenberg, 2004.

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