APA (7th ed.) Citation

Robertson, J. M. (1929). History of freethought in the Nineteenth Century. Kessinger.

Chicago Style (17th ed.) Citation

Robertson, J. M. History of Freethought in the Nineteenth Century. [U.K.]: Kessinger, 1929.

MLA (9th ed.) Citation

Robertson, J. M. History of Freethought in the Nineteenth Century. Kessinger, 1929.

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