APA (7th ed.) Citation

Buckle, H. T. (2013). History of Civilization in England, Vol. 1 of 3. Project Gutenberg.

Chicago Style (17th ed.) Citation

Buckle, Henry Thomas. History of Civilization in England, Vol. 1 of 3. Project Gutenberg, 2013.

MLA (9th ed.) Citation

Buckle, Henry Thomas. History of Civilization in England, Vol. 1 of 3. Project Gutenberg, 2013.

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