APA (7th ed.) Citation

Smiles, S., & Smiles, S. (2008). A Boy's Voyage Round the World. Project Gutenberg.

Chicago Style (17th ed.) Citation

Smiles, Samuel, and Samuel Smiles. A Boy's Voyage Round the World. Project Gutenberg, 2008.

MLA (9th ed.) Citation

Smiles, Samuel, and Samuel Smiles. A Boy's Voyage Round the World. Project Gutenberg, 2008.

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