APA-Zitierstil (7. Ausg.)

Robertson, J. M. (1929). A history of freethought in the nineteenth century (1. publ.). Watts.

Chicago-Zitierstil (17. Ausg.)

Robertson, John M. A History of Freethought in the Nineteenth Century. 1. publ. London: Watts, 1929.

MLA-Zitierstil (9. Ausg.)

Robertson, John M. A History of Freethought in the Nineteenth Century. 1. publ. Watts, 1929.