APA (7th ed.) Citation

Tappan, E. M. (2008). Diggers in the Earth. Project Gutenberg.

Chicago Style (17th ed.) Citation

Tappan, Eva March. Diggers in the Earth. Project Gutenberg, 2008.

MLA (9th ed.) Citation

Tappan, Eva March. Diggers in the Earth. Project Gutenberg, 2008.

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