APA (7th ed.) Citation

Robertoson, J. M. (1914). A short history of free thought: Ancient and modern. Watts & Co.

Chicago Style (17th ed.) Citation

Robertoson, John M. A Short History of Free Thought: Ancient and Modern. London: Watts & Co, 1914.

MLA (9th ed.) Citation

Robertoson, John M. A Short History of Free Thought: Ancient and Modern. Watts & Co, 1914.

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