Bibliography
1. Jezierski, John Vincent. Enterprising Images: The Goodridge Brothers, African American Photographers, 1847-1922. (Detroit, Michigan: Wayne State University Press, 2000).
2. McClure, James. Almost Forgotten A Glimpse at Black History in York County, Pa. (York, PA: York Daily Record/York County Heritage Trust, 2002).
3. Switala, William J. The Underground Railroad in Pennsylvania 2nd ed. (Mechanicsburg, Pennsylvania: Stackpole Books, 2008 originally published in 2001).