APA (7th ed.) Citation

Barbour, R. H. (2011). Four Afloat Being the Adventures of the Big Four on the Water. Project Gutenberg.

Chicago Style (17th ed.) Citation

Barbour, Ralph Henry. Four Afloat Being the Adventures of the Big Four on the Water. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Barbour, Ralph Henry. Four Afloat Being the Adventures of the Big Four on the Water. Project Gutenberg, 2011.

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