Purdon, J., & Stewart, A. (1916). Stewart's Purdon's digest: Cumulative supplement to Purdon's digest : a digest of the statute law of the state of Pennsylvania for the years 1905-1915 (13th ed.). Philadelphia: the George T. Bisel Co..

Purdon, John, and Ardemus Stewart. Stewart's Purdon's Digest: Cumulative Supplement to Purdon's Digest : A Digest of the Statute Law of the State of Pennsylvania for the Years 1905-1915. 13th ed. Philadelphia: the George T. Bisel Co., 1916.

Purdon, John, and Ardemus Stewart. Stewart's Purdon's Digest: Cumulative Supplement to Purdon's Digest : A Digest of the Statute Law of the State of Pennsylvania for the Years 1905-1915. 13th ed. Philadelphia: the George T. Bisel Co., 1916.