APA (7th ed.) Citation

Williams, J. W. (1903). A sketch of the history of obstetrics in the United States up to 1860. s.n..

Chicago Style (17th ed.) Citation

Williams, J. Whitridge. A Sketch of the History of Obstetrics in the United States Up to 1860. [s.l.: s.n., 1903.

MLA (8th ed.) Citation

Williams, J. Whitridge. A Sketch of the History of Obstetrics in the United States Up to 1860. s.n., 1903.