APA (7th ed.) Citation

Hillyer, R. (2004). The Five Books of Youth. Project Gutenberg.

Chicago Style (17th ed.) Citation

Hillyer, Robert. The Five Books of Youth. Project Gutenberg, 2004.

MLA (9th ed.) Citation

Hillyer, Robert. The Five Books of Youth. Project Gutenberg, 2004.

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